{"id":27283,"date":"2026-03-17T17:00:36","date_gmt":"2026-03-17T09:00:36","guid":{"rendered":"https:\/\/www.recommend.my\/blog\/?p=27283"},"modified":"2026-03-17T17:04:53","modified_gmt":"2026-03-17T09:04:53","slug":"what-hp-aircon-size-do-i-need-for-my-room-sizing-guide","status":"publish","type":"post","link":"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/","title":{"rendered":"What HP Aircon Size Do I Need for My Room? (Sizing Guide)"},"content":{"rendered":"\n<p class=\"has-drop-cap wp-block-paragraph\">Malaysia could be heading into its hottest year on record.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In February 2026, climate experts warned that there is a <a href=\"https:\/\/www.thestar.com.my\/news\/nation\/2026\/02\/20\/el-nino-return-could-spark-record-temperatures\" target=\"_blank\" rel=\"noreferrer noopener\">60 to 70 per cent chance El Ni\u00f1o will develop in the second half of this year<\/a> and carry over into 2027. Professor Emeritus Fredolin Tangang of Universiti Kebangsaan Malaysia said that if it does arrive, 2026 or 2027 could surpass 2024 as the warmest year ever recorded. MetMalaysia has already projected drier-than-normal conditions from February through July, with heat and fire risks rising across Peninsular Malaysia and Sarawak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you have been thinking about buying a new aircon, or replacing an old one, then one of the most important decisions is choosing the right horsepower (HP) for your room. Too low, and you might sweat through the night. Too high, and you will pay for cooling power you do not need. But, like Goldilocks, when you get it &#8220;just right&#8221;, your aircon will run efficiently, keep your room comfortable, and won&#8217;t push your <a href=\"https:\/\/www.recommend.my\/blog\/aircon-electricity-cost-malaysia\/\">TNB electricity bill<\/a> into a higher tariff band.<\/p>\n\n\n\n<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');\n\n.hp-calc {\n  --c-brand: #0072CE;\n  --c-brand-dark: #005AA0;\n  --c-brand-light: #E8F4FD;\n  --c-accent: #FF6B35;\n  --c-bg: #FAFBFC;\n  --c-card: #FFFFFF;\n  --c-border: #E2E8F0;\n  --c-text: #1E293B;\n  --c-text-mid: #475569;\n  --c-text-light: #94A3B8;\n  --c-success: #10B981;\n  --c-warning: #F59E0B;\n  --radius: 12px;\n  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);\n  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);\n  --shadow-lg: 0 12px 32px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.06);\n\n  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;\n  max-width: 720px;\n  margin: 2rem auto;\n  background: var(--c-bg);\n  border-radius: 16px;\n  overflow: hidden;\n  box-shadow: var(--shadow-lg);\n  color: var(--c-text);\n  line-height: 1.5;\n  -webkit-font-smoothing: antialiased;\n}\n\n.hp-calc * { box-sizing: border-box; margin: 0; padding: 0; }\n\n\/* Header *\/\n.hp-calc__header {\n  background: linear-gradient(135deg, var(--c-brand) 0%, var(--c-brand-dark) 100%);\n  padding: 28px 32px;\n  color: #fff;\n  position: relative;\n  overflow: hidden;\n}\n\n.hp-calc__header::before {\n  content: '';\n  position: absolute;\n  top: -40px;\n  right: -30px;\n  width: 140px;\n  height: 140px;\n  border-radius: 50%;\n  background: rgba(255,255,255,0.08);\n}\n\n.hp-calc__header::after {\n  content: '';\n  position: absolute;\n  bottom: -20px;\n  right: 40px;\n  width: 80px;\n  height: 80px;\n  border-radius: 50%;\n  background: rgba(255,255,255,0.05);\n}\n\n.hp-calc__title {\n  font-size: 22px;\n  font-weight: 700;\n  letter-spacing: -0.3px;\n  margin-bottom: 4px;\n  position: relative;\n}\n\n.hp-calc__subtitle {\n  font-size: 14px;\n  opacity: 0.85;\n  font-weight: 400;\n  position: relative;\n}\n\n\/* Body *\/\n.hp-calc__body {\n  padding: 28px 32px 20px;\n}\n\n\/* Section labels *\/\n.hp-calc__section-label {\n  font-size: 11px;\n  font-weight: 600;\n  text-transform: uppercase;\n  letter-spacing: 0.8px;\n  color: var(--c-brand);\n  margin-bottom: 16px;\n  display: flex;\n  align-items: center;\n  gap: 8px;\n}\n\n.hp-calc__section-label::after {\n  content: '';\n  flex: 1;\n  height: 1px;\n  background: var(--c-border);\n}\n\n\/* Input row *\/\n.hp-calc__row {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 16px;\n  margin-bottom: 16px;\n}\n\n.hp-calc__row--three {\n  grid-template-columns: 1fr 1fr 1fr;\n}\n\n.hp-calc__field {\n  display: flex;\n  flex-direction: column;\n  gap: 6px;\n}\n\n.hp-calc__field--full {\n  grid-column: 1 \/ -1;\n}\n\n.hp-calc__label {\n  font-size: 13px;\n  font-weight: 500;\n  color: var(--c-text-mid);\n}\n\n.hp-calc__input {\n  width: 100%;\n  padding: 10px 14px;\n  border: 1.5px solid var(--c-border);\n  border-radius: 8px;\n  font-family: inherit;\n  font-size: 15px;\n  font-weight: 500;\n  color: var(--c-text);\n  background: var(--c-card);\n  transition: border-color 0.2s, box-shadow 0.2s;\n  outline: none;\n  -webkit-appearance: none;\n  appearance: none;\n}\n\n.hp-calc__input:focus {\n  border-color: var(--c-brand);\n  box-shadow: 0 0 0 3px rgba(0, 114, 206, 0.12);\n}\n\n.hp-calc__input::placeholder {\n  color: var(--c-text-light);\n  font-weight: 400;\n}\n\n.hp-calc__suffix {\n  font-size: 13px;\n  color: var(--c-text-light);\n  font-weight: 400;\n}\n\n.hp-calc__input-wrap {\n  position: relative;\n}\n\n.hp-calc__input-wrap .hp-calc__input {\n  padding-right: 36px;\n}\n\n.hp-calc__input-unit {\n  position: absolute;\n  right: 12px;\n  top: 50%;\n  transform: translateY(-50%);\n  font-size: 13px;\n  color: var(--c-text-light);\n  pointer-events: none;\n  font-weight: 500;\n}\n\n\/* Select styling *\/\n.hp-calc__select-wrap {\n  position: relative;\n}\n\n.hp-calc__select-wrap::after {\n  content: '';\n  position: absolute;\n  right: 14px;\n  top: 50%;\n  transform: translateY(-50%);\n  width: 0;\n  height: 0;\n  border-left: 5px solid transparent;\n  border-right: 5px solid transparent;\n  border-top: 5px solid var(--c-text-light);\n  pointer-events: none;\n}\n\n.hp-calc__select-wrap .hp-calc__input {\n  padding-right: 36px;\n  cursor: pointer;\n}\n\n\/* Toggle chips *\/\n.hp-calc__chips {\n  display: flex;\n  flex-wrap: wrap;\n  gap: 8px;\n  margin-bottom: 16px;\n}\n\n.hp-calc__chip {\n  display: flex;\n  align-items: center;\n  gap: 6px;\n  padding: 8px 14px;\n  border: 1.5px solid var(--c-border);\n  border-radius: 8px;\n  font-family: inherit;\n  font-size: 13px;\n  font-weight: 500;\n  color: var(--c-text-mid);\n  background: var(--c-card);\n  cursor: pointer;\n  transition: all 0.2s;\n  user-select: none;\n  -webkit-user-select: none;\n}\n\n.hp-calc__chip:hover {\n  border-color: var(--c-brand);\n  color: var(--c-brand);\n}\n\n.hp-calc__chip--active {\n  background: var(--c-brand-light);\n  border-color: var(--c-brand);\n  color: var(--c-brand);\n  font-weight: 600;\n}\n\n.hp-calc__chip-icon {\n  font-size: 16px;\n  line-height: 1;\n}\n\n\/* Divider *\/\n.hp-calc__divider {\n  height: 1px;\n  background: var(--c-border);\n  margin: 24px 0;\n}\n\n\/* Result *\/\n.hp-calc__result {\n  background: var(--c-card);\n  border: 2px solid var(--c-border);\n  border-radius: var(--radius);\n  padding: 24px;\n  margin-top: 8px;\n  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);\n}\n\n.hp-calc__result--ready {\n  border-color: var(--c-brand);\n  box-shadow: var(--shadow-md), 0 0 0 3px rgba(0, 114, 206, 0.06);\n}\n\n.hp-calc__result-grid {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 20px;\n}\n\n.hp-calc__result-item {\n  text-align: center;\n}\n\n.hp-calc__result-item--primary {\n  background: linear-gradient(135deg, var(--c-brand) 0%, var(--c-brand-dark) 100%);\n  border-radius: 10px;\n  padding: 20px 16px;\n  color: #fff;\n}\n\n.hp-calc__result-value {\n  font-size: 36px;\n  font-weight: 700;\n  letter-spacing: -1px;\n  line-height: 1.1;\n}\n\n.hp-calc__result-item--primary .hp-calc__result-value {\n  font-size: 42px;\n}\n\n.hp-calc__result-unit {\n  font-size: 18px;\n  font-weight: 500;\n  opacity: 0.8;\n}\n\n.hp-calc__result-label {\n  font-size: 12px;\n  font-weight: 500;\n  text-transform: uppercase;\n  letter-spacing: 0.5px;\n  margin-top: 4px;\n  opacity: 0.7;\n}\n\n.hp-calc__result-item:not(.hp-calc__result-item--primary) .hp-calc__result-value {\n  color: var(--c-brand);\n}\n\n.hp-calc__result-item:not(.hp-calc__result-item--primary) .hp-calc__result-label {\n  color: var(--c-text-mid);\n}\n\n\/* Result details bar *\/\n.hp-calc__result-details {\n  display: grid;\n  grid-template-columns: 1fr 1fr 1fr;\n  gap: 12px;\n  margin-top: 20px;\n  padding-top: 20px;\n  border-top: 1px solid var(--c-border);\n}\n\n.hp-calc__detail {\n  text-align: center;\n}\n\n.hp-calc__detail-value {\n  font-size: 18px;\n  font-weight: 700;\n  color: var(--c-text);\n}\n\n.hp-calc__detail-label {\n  font-size: 11px;\n  color: var(--c-text-light);\n  font-weight: 500;\n  text-transform: uppercase;\n  letter-spacing: 0.4px;\n  margin-top: 2px;\n}\n\n\/* Tip callout *\/\n.hp-calc__tip {\n  display: flex;\n  gap: 10px;\n  margin-top: 16px;\n  padding: 14px 16px;\n  background: #FFFBEB;\n  border: 1px solid #FDE68A;\n  border-radius: 8px;\n  font-size: 13px;\n  color: #92400E;\n  line-height: 1.5;\n}\n\n.hp-calc__tip-icon {\n  flex-shrink: 0;\n  font-size: 16px;\n  margin-top: 1px;\n}\n\n.hp-calc__tip--hidden {\n  display: none;\n}\n\n\/* Empty state *\/\n.hp-calc__empty {\n  text-align: center;\n  padding: 24px 16px;\n  color: var(--c-text-light);\n  font-size: 14px;\n}\n\n.hp-calc__empty-icon {\n  font-size: 32px;\n  margin-bottom: 8px;\n  opacity: 0.5;\n}\n\n\/* Footer *\/\n.hp-calc__footer {\n  padding: 16px 32px 24px;\n  text-align: center;\n}\n\n.hp-calc__cta {\n  display: inline-flex;\n  align-items: center;\n  gap: 8px;\n  padding: 12px 28px;\n  background: var(--c-accent);\n  color: #fff;\n  font-family: inherit;\n  font-size: 14px;\n  font-weight: 600;\n  border: none;\n  border-radius: 8px;\n  cursor: pointer;\n  text-decoration: none;\n  transition: all 0.2s;\n  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);\n}\n\n.hp-calc__cta:hover {\n  background: #E55A28;\n  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.4);\n  transform: translateY(-1px);\n}\n\n.hp-calc__powered {\n  margin-top: 12px;\n  font-size: 11px;\n  color: var(--c-text-light);\n}\n\n.hp-calc__powered a {\n  color: var(--c-brand);\n  text-decoration: none;\n  font-weight: 500;\n}\n\n\/* Responsive *\/\n@media (max-width: 520px) {\n  .hp-calc { margin: 1rem; border-radius: 12px; }\n  .hp-calc__header { padding: 22px 20px; }\n  .hp-calc__title { font-size: 19px; }\n  .hp-calc__body { padding: 22px 20px 16px; }\n  .hp-calc__row { grid-template-columns: 1fr 1fr; gap: 12px; }\n  .hp-calc__row--three { grid-template-columns: 1fr 1fr; }\n  .hp-calc__result-grid { grid-template-columns: 1fr 1fr; gap: 14px; }\n  .hp-calc__result-details { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }\n  .hp-calc__chips { gap: 6px; }\n  .hp-calc__chip { padding: 7px 11px; font-size: 12px; }\n  .hp-calc__footer { padding: 14px 20px 20px; }\n}\n<\/style>\n\n<div class=\"hp-calc\" id=\"hpCalc\">\n  <div class=\"hp-calc__header\">\n    <div class=\"hp-calc__title\">Aircon HP Calculator<\/div>\n    <div class=\"hp-calc__subtitle\">Find the right cooling power for your room in Malaysia<\/div>\n  <\/div>\n\n  <div class=\"hp-calc__body\">\n\n    <div class=\"hp-calc__section-label\">Room Dimensions<\/div>\n\n    <div class=\"hp-calc__row hp-calc__row--three\">\n      <div class=\"hp-calc__field\">\n        <label class=\"hp-calc__label\" for=\"roomLength\">Length<\/label>\n        <div class=\"hp-calc__input-wrap\">\n          <input class=\"hp-calc__input\" type=\"number\" id=\"roomLength\" placeholder=\"e.g. 12\" min=\"1\" max=\"100\" step=\"0.5\" value=\"10\">\n          <span class=\"hp-calc__input-unit\">ft<\/span>\n        <\/div>\n      <\/div>\n      <div class=\"hp-calc__field\">\n        <label class=\"hp-calc__label\" for=\"roomWidth\">Width<\/label>\n        <div class=\"hp-calc__input-wrap\">\n          <input class=\"hp-calc__input\" type=\"number\" id=\"roomWidth\" placeholder=\"e.g. 10\" min=\"1\" max=\"100\" step=\"0.5\" value=\"12\">\n          <span class=\"hp-calc__input-unit\">ft<\/span>\n        <\/div>\n      <\/div>\n      <div class=\"hp-calc__field\">\n        <label class=\"hp-calc__label\" for=\"ceilingHeight\">Ceiling Height<\/label>\n        <div class=\"hp-calc__input-wrap\">\n          <input class=\"hp-calc__input\" type=\"number\" id=\"ceilingHeight\" placeholder=\"10\" min=\"7\" max=\"30\" step=\"0.5\" value=\"10\">\n          <span class=\"hp-calc__input-unit\">ft<\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"hp-calc__row\">\n      <div class=\"hp-calc__field\">\n        <label class=\"hp-calc__label\" for=\"occupants\">Occupants (usual)<\/label>\n        <div class=\"hp-calc__select-wrap\">\n          <select class=\"hp-calc__input\" id=\"occupants\">\n            <option value=\"1\">1 person<\/option>\n            <option value=\"2\" selected>2 people<\/option>\n            <option value=\"3\">3 people<\/option>\n            <option value=\"4\">4 people<\/option>\n            <option value=\"5\">5 people<\/option>\n            <option value=\"6\">6+ people<\/option>\n          <\/select>\n        <\/div>\n      <\/div>\n      <div class=\"hp-calc__field\">\n        <label class=\"hp-calc__label\" for=\"sunExposure\">Sun Exposure<\/label>\n        <div class=\"hp-calc__select-wrap\">\n          <select class=\"hp-calc__input\" id=\"sunExposure\">\n            <option value=\"none\">Shaded \/ minimal<\/option>\n            <option value=\"moderate\" selected>Some sun<\/option>\n            <option value=\"heavy\">West-facing \/ direct sun<\/option>\n          <\/select>\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"hp-calc__section-label\">Additional Factors<\/div>\n\n    <div class=\"hp-calc__chips\">\n      <button type=\"button\" class=\"hp-calc__chip\" data-factor=\"topFloor\" onclick=\"toggleChip(this)\">\n        <span class=\"hp-calc__chip-icon\">\ud83c\udfe0<\/span> Top floor \/ poor insulation\n      <\/button>\n      <button type=\"button\" class=\"hp-calc__chip\" data-factor=\"glass\" onclick=\"toggleChip(this)\">\n        <span class=\"hp-calc__chip-icon\">\ud83e\ude9f<\/span> Large glass walls\n      <\/button>\n      <button type=\"button\" class=\"hp-calc__chip\" data-factor=\"kitchen\" onclick=\"toggleChip(this)\">\n        <span class=\"hp-calc__chip-icon\">\ud83c\udf73<\/span> Kitchen area\n      <\/button>\n    <\/div>\n\n    <div class=\"hp-calc__divider\"><\/div>\n\n    <!-- Result -->\n    <div class=\"hp-calc__result\" id=\"resultBox\">\n      <div id=\"resultEmpty\" class=\"hp-calc__empty\">\n        <div class=\"hp-calc__empty-icon\">\ud83d\udcd0<\/div>\n        Enter your room length and width above to get a recommendation.\n      <\/div>\n\n      <div id=\"resultContent\" style=\"display:none;\">\n        <div class=\"hp-calc__result-grid\">\n          <div class=\"hp-calc__result-item hp-calc__result-item--primary\">\n            <div class=\"hp-calc__result-value\"><span id=\"resHP\">\u2014<\/span> <span class=\"hp-calc__result-unit\">HP<\/span><\/div>\n            <div class=\"hp-calc__result-label\">Recommended<\/div>\n          <\/div>\n          <div class=\"hp-calc__result-item\">\n            <div class=\"hp-calc__result-value\"><span id=\"resBTU\">\u2014<\/span><\/div>\n            <div class=\"hp-calc__result-label\">BTU Needed<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"hp-calc__result-details\">\n          <div class=\"hp-calc__detail\">\n            <div class=\"hp-calc__detail-value\" id=\"resArea\">\u2014<\/div>\n            <div class=\"hp-calc__detail-label\">Room (sq ft)<\/div>\n          <\/div>\n          <div class=\"hp-calc__detail\">\n            <div class=\"hp-calc__detail-value\" id=\"resBaseBTU\">\u2014<\/div>\n            <div class=\"hp-calc__detail-label\">Base BTU<\/div>\n          <\/div>\n          <div class=\"hp-calc__detail\">\n            <div class=\"hp-calc__detail-value\" id=\"resAdjust\">+0%<\/div>\n            <div class=\"hp-calc__detail-label\">Adjustment<\/div>\n          <\/div>\n        <\/div>\n\n        <div class=\"hp-calc__tip\" id=\"tipBox\">\n          <span class=\"hp-calc__tip-icon\">\ud83d\udca1<\/span>\n          <span id=\"tipText\"><\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"hp-calc__footer\">\n    <a href=\"https:\/\/www.recommend.my\/service\/air-conditioning\" class=\"hp-calc__cta\" target=\"_blank\" rel=\"noopener\">\n      Get a Free Quote for Installation \u2192\n    <\/a>\n    <div class=\"hp-calc__powered\">Calculator by <a href=\"https:\/\/www.recommend.my\/\" target=\"_blank\" rel=\"noopener\">Recommend.my<\/a><\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function() {\n  var factors = { topFloor: false, glass: false, kitchen: false };\n\n  var inputs = ['roomLength', 'roomWidth', 'ceilingHeight', 'occupants', 'sunExposure'];\n  inputs.forEach(function(id) {\n    document.getElementById(id).addEventListener('input', calculate);\n    document.getElementById(id).addEventListener('change', calculate);\n  });\n\n  window.toggleChip = function(btn) {\n    var key = btn.getAttribute('data-factor');\n    factors[key] = !factors[key];\n    btn.classList.toggle('hp-calc__chip--active', factors[key]);\n    calculate();\n  };\n\n  function calculate() {\n    var len = parseFloat(document.getElementById('roomLength').value);\n    var wid = parseFloat(document.getElementById('roomWidth').value);\n    var ceil = parseFloat(document.getElementById('ceilingHeight').value) || 10;\n    var occ = parseInt(document.getElementById('occupants').value) || 2;\n    var sun = document.getElementById('sunExposure').value;\n\n    var resultBox = document.getElementById('resultBox');\n    var resultEmpty = document.getElementById('resultEmpty');\n    var resultContent = document.getElementById('resultContent');\n\n    if (!len || !wid || len <= 0 || wid <= 0) {\n      resultEmpty.style.display = '';\n      resultContent.style.display = 'none';\n      resultBox.classList.remove('hp-calc__result--ready');\n      return;\n    }\n\n    resultEmpty.style.display = 'none';\n    resultContent.style.display = '';\n    resultBox.classList.add('hp-calc__result--ready');\n\n    var area = len * wid;\n    var baseBTU = area * 60;\n    var adjustPct = 0;\n    var tips = [];\n\n    \/\/ Ceiling height adjustment: +10% per ft above 10\n    if (ceil > 10) {\n      var ceilAdd = (ceil - 10) * 10;\n      adjustPct += ceilAdd;\n      tips.push('High ceiling adds ' + Math.round(ceilAdd) + '% to your cooling needs.');\n    }\n\n    \/\/ Sun exposure\n    if (sun === 'moderate') {\n      adjustPct += 5;\n    } else if (sun === 'heavy') {\n      adjustPct += 15;\n      tips.push('West-facing rooms absorb significant afternoon heat.');\n    }\n\n    \/\/ Extra occupants (above 2)\n    var extraPeople = Math.max(0, occ - 2);\n    var peopleBTU = extraPeople * 600;\n\n    \/\/ Factor chips\n    if (factors.topFloor) {\n      adjustPct += 10;\n      tips.push('Top-floor rooms absorb roof heat \u2014 consider an inverter unit for efficiency.');\n    }\n    if (factors.glass) {\n      adjustPct += 12;\n      tips.push('Large glass surfaces let in more heat than brick walls.');\n    }\n    if (factors.kitchen) {\n      peopleBTU += 4000;\n      tips.push('Kitchens need extra cooling to handle heat from cooking.');\n    }\n\n    var adjustedBTU = Math.round(baseBTU * (1 + adjustPct \/ 100) + peopleBTU);\n\n    \/\/ Map BTU to standard HP sizes\n    var hpOptions = [\n      { hp: 1.0, btu: 9000 },\n      { hp: 1.5, btu: 12000 },\n      { hp: 2.0, btu: 18000 },\n      { hp: 2.5, btu: 22000 },\n      { hp: 3.0, btu: 27000 }\n    ];\n\n    var recommended = hpOptions[hpOptions.length - 1];\n    for (var i = 0; i < hpOptions.length; i++) {\n      if (hpOptions[i].btu >= adjustedBTU) {\n        recommended = hpOptions[i];\n        break;\n      }\n    }\n\n    \/\/ Format numbers with commas\n    function fmt(n) {\n      return n.toString().replace(\/\\B(?=(\\d{3})+(?!\\d))\/g, ',');\n    }\n\n    document.getElementById('resHP').textContent = recommended.hp.toFixed(1);\n    document.getElementById('resBTU').textContent = fmt(adjustedBTU);\n    document.getElementById('resArea').textContent = Math.round(area);\n    document.getElementById('resBaseBTU').textContent = fmt(Math.round(baseBTU));\n    document.getElementById('resAdjust').textContent = adjustPct > 0 || peopleBTU > 0 ? '+' + adjustPct + '%' + (peopleBTU > 0 ? ' +' + fmt(peopleBTU) : '') : 'None';\n\n    \/\/ Tip\n    var tipBox = document.getElementById('tipBox');\n    var tipText = document.getElementById('tipText');\n    if (tips.length > 0) {\n      tipBox.classList.remove('hp-calc__tip--hidden');\n      tipText.textContent = tips[0];\n    } else if (adjustedBTU > 24000) {\n      tipBox.classList.remove('hp-calc__tip--hidden');\n      tipText.textContent = 'For rooms this large, consider a ceiling cassette unit or multiple split units for even cooling.';\n    } else {\n      tipBox.classList.add('hp-calc__tip--hidden');\n    }\n  }\n\n  \/\/ Run once on load in case browser autofills\n  calculate();\n})();\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">Here is a quick guide to figure out what aircon size you need to buy for your room.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6ac624e678b95\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6ac624e678b95\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#Quick_Reference_Aircon_HP_by_Room_Size\" >Quick Reference: Aircon HP by Room Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#What_Do_HP_and_BTU_Actually_Mean\" >What Do HP and BTU Actually Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#The_Simple_Formula_If_You_Want_to_Calculate_It_Yourself\" >The Simple Formula (If You Want to Calculate It Yourself)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#When_You_Need_to_Size_Up_Adjustment_Factors\" >When You Need to Size Up (Adjustment Factors)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#What_Happens_If_You_Choose_the_Wrong_HP\" >What Happens If You Choose the Wrong HP?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#Room-by-Room_Guide_for_a_Typical_Malaysian_Home\" >Room-by-Room Guide for a Typical Malaysian Home<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#Does_the_Type_of_Aircon_Matter\" >Does the Type of Aircon Matter?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#Still_Not_Sure_Get_a_Professional_Assessment\" >Still Not Sure? Get a Professional Assessment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quick_Reference_Aircon_HP_by_Room_Size\"><\/span>Quick Reference: Aircon HP by Room Size<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For most Malaysian homes with standard ceiling heights (9 to 10 feet), this table is all you need:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Room Size (sq ft)<\/th><th>Recommended HP<\/th><th>Approximate BTU<\/th><th>Typical Room<\/th><\/tr><\/thead><tbody><tr><td>Up to 150<\/td><td>1.0 HP<\/td><td>9,000 BTU<\/td><td>Small bedroom, study room<\/td><\/tr><tr><td>150 \u2013 250<\/td><td>1.5 HP<\/td><td>12,000 BTU<\/td><td>Standard bedroom, home office<\/td><\/tr><tr><td>250 \u2013 350<\/td><td>2.0 HP<\/td><td>18,000 BTU<\/td><td>Master bedroom, large bedroom<\/td><\/tr><tr><td>350 \u2013 450<\/td><td>2.5 HP<\/td><td>22,000 \u2013 24,000 BTU<\/td><td>Large living room, dining area<\/td><\/tr><tr><td>450 \u2013 550<\/td><td>3.0 HP<\/td><td>24,000 \u2013 27,000 BTU<\/td><td>Open-plan living area, commercial space<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How to read this table:<\/strong> Measure your room&#8217;s length and width in feet, then multiply them. A room that is 12 feet by 10 feet = 120 sq ft, so a 1.0 HP aircon is a good fit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This table assumes a room with normal insulation, no extreme sun exposure, and a ceiling height of about 10 feet or below. If your room has special conditions, keep reading.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Tip:<\/strong> Not sure what size your room is? Most Malaysian bedrooms in terrace houses are between 100 and 200 sq ft. A typical master bedroom is around 200 to 250 sq ft. Your living room is usually 250 to 400 sq ft depending on the house type.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Do_HP_and_BTU_Actually_Mean\"><\/span>What Do HP and BTU Actually Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You will hear two terms thrown around when shopping for an aircon: HP and BTU.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HP (Horsepower)<\/strong> is how most Malaysians describe the &#8220;size&#8221; of an aircon. When someone says &#8220;I need a 1.5 HP aircon,&#8221; they are talking about its cooling power.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BTU (British Thermal Unit)<\/strong> is the more precise measurement. It tells you how much heat the aircon can remove from a room in one hour. A higher BTU means stronger cooling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The rough conversion is: <strong>1.0 HP \u2248 9,000 BTU\/hr<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But here is something worth knowing: two different &#8220;1.0 HP&#8221; models from different brands can have slightly different BTU ratings. One brand might rate their 1.0 HP unit at 9,000 BTU while another rates theirs at 9,600 BTU. So if you are comparing models, check the BTU number on the spec sheet rather than relying on the HP label alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are also weighing up <a href=\"https:\/\/www.recommend.my\/blog\/why-choose-an-inverter-aircon\/\">inverter vs non-inverter aircons<\/a>, an inverter unit will generally deliver more consistent cooling at the same HP rating because it adjusts the compressor speed instead of cycling on and off.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Simple_Formula_If_You_Want_to_Calculate_It_Yourself\"><\/span>The Simple Formula (If You Want to Calculate It Yourself)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The rule of thumb used by most aircon contractors in Malaysia is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Room area (sq ft) \u00d7 60 BTU = Cooling capacity needed<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then divide by 9,000 to get the HP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Worked example:<\/strong> Your bedroom is 12 feet long and 15 feet wide.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Floor area: 12 \u00d7 15 = 180 sq ft<\/li>\n\n\n\n<li>BTU needed: 180 \u00d7 60 = 10,800 BTU<\/li>\n\n\n\n<li>HP needed: 10,800 \u00f7 9,000 = 1.2 HP<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Since aircons come in fixed sizes, you would round up to <strong>1.5 HP<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This formula assumes a standard ceiling height of about 10 feet, which covers most Malaysian homes. If your ceiling is higher than that, see the adjustments below.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_You_Need_to_Size_Up_Adjustment_Factors\"><\/span>When You Need to Size Up (Adjustment Factors)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The table and formula above work well for a &#8220;normal&#8221; room. But some rooms need extra cooling power. Here are the common situations:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">High Ceilings (Above 10 Feet)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Taller ceilings mean more air volume to cool. For every extra foot above 10 feet, add 10% more BTU.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example:<\/strong> A 200 sq ft room with a 13-foot ceiling would need 30% more BTU than normal.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Base BTU: 200 \u00d7 60 = 12,000<\/li>\n\n\n\n<li>Adjusted: 12,000 \u00d7 1.3 = 15,600 BTU<\/li>\n\n\n\n<li>That pushes you from 1.5 HP to <strong>2.0 HP<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">West-Facing Rooms or Direct Afternoon Sun<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In Malaysia, the afternoon sun hits hard from the west. If your room faces west, or has large windows getting direct sunlight for several hours, the walls and glass absorb and radiate heat into the room.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommendation:<\/strong> Go up one HP size from what the table suggests. A room that would normally need 1.0 HP should get a 1.5 HP unit instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is especially important for corner houses (landed properties) and top-floor apartments where heat comes from both the walls and the roof. If you are in this situation, a <a href=\"https:\/\/www.recommend.my\/blog\/how-often-do-you-really-need-to-service-your-aircon\/\">well-maintained aircon<\/a> that does not have to fight through dust and grime will make a real difference to how well it copes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Large Windows or Floor-to-Ceiling Glass<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Modern condos often feature floor-to-ceiling glass panels. Glass is a poor insulator compared to brick walls, so these rooms heat up faster than their floor area would suggest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommendation:<\/strong> Add 10 to 15% more BTU, or go up one HP size if the glass covers a large portion of the wall.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">More Than 2 People in the Room Regularly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Each person generates body heat. If the room regularly has more than two occupants (for example, a family TV room or a small home office with a few people), add about 600 BTU per extra person.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kitchens<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cooking generates a lot of heat. If you are cooling an open-concept kitchen area, add an extra 4,000 BTU on top of the base calculation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"558\" src=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/15GZY1MM2ajh_tTyF53g8_Jbh6KN4x-1000x558.jpg\" alt=\"aircon sizing comparison\" class=\"wp-image-27289\" srcset=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/15GZY1MM2ajh_tTyF53g8_Jbh6KN4x-1000x558.jpg 1000w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/15GZY1MM2ajh_tTyF53g8_Jbh6KN4x-538x300.jpg 538w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/15GZY1MM2ajh_tTyF53g8_Jbh6KN4x-218x122.jpg 218w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/15GZY1MM2ajh_tTyF53g8_Jbh6KN4x.jpg 1376w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Happens_If_You_Choose_the_Wrong_HP\"><\/span>What Happens If You Choose the Wrong HP?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Too Small (Undersized)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An undersized aircon will run at full blast all day trying to reach your set temperature, but it will never get there. You end up with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A room that feels warm even though the aircon is on<\/li>\n\n\n\n<li>Higher electricity bills because the unit runs nonstop (see our <a href=\"https:\/\/www.recommend.my\/blog\/aircon-electricity-cost-malaysia\/\">guide to aircon electricity costs in Malaysia<\/a> for the actual numbers)<\/li>\n\n\n\n<li>Faster wear and tear, leading to breakdowns<\/li>\n\n\n\n<li>If the unit is constantly overworked, it may start <a href=\"https:\/\/www.recommend.my\/blog\/common-reasons-aircon-leaking\/\">leaking<\/a> or <a href=\"https:\/\/www.recommend.my\/blog\/aircon-noisy-how-to-identify-the-problem-and-when-to-call-a-pro\/\">making noise<\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Too Big (Oversized)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An oversized unit cools the room too quickly and then shuts off. A few minutes later, the temperature creeps up and the unit kicks in again. This &#8220;short cycling&#8221; causes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Poor dehumidification. The aircon does not run long enough to pull moisture from the air, so the room feels cold but clammy and damp<\/li>\n\n\n\n<li>Wasted electricity from frequent on-off cycling<\/li>\n\n\n\n<li>More strain on the compressor<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Both problems lead to the same place: higher bills and a shorter aircon lifespan. Getting the right size from the start saves you money.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Room-by-Room_Guide_for_a_Typical_Malaysian_Home\"><\/span>Room-by-Room Guide for a Typical Malaysian Home<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here is a practical breakdown for common house layouts in Malaysia:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Terrace House (2-Storey, 20 \u00d7 70 ft)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Room<\/th><th>Typical Size<\/th><th>Recommended HP<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>Master bedroom<\/td><td>180 \u2013 220 sq ft<\/td><td>1.5 HP<\/td><td>Go 2.0 HP if top floor with poor roof insulation<\/td><\/tr><tr><td>Second bedroom<\/td><td>120 \u2013 150 sq ft<\/td><td>1.0 HP<\/td><td>Standard choice for most families<\/td><\/tr><tr><td>Third bedroom<\/td><td>100 \u2013 130 sq ft<\/td><td>1.0 HP<\/td><td><\/td><\/tr><tr><td>Living room<\/td><td>250 \u2013 350 sq ft<\/td><td>2.0 \u2013 2.5 HP<\/td><td>Depends on whether it is open to dining area<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Condo \/ Apartment (800 \u2013 1,200 sq ft)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Room<\/th><th>Typical Size<\/th><th>Recommended HP<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>Master bedroom<\/td><td>150 \u2013 200 sq ft<\/td><td>1.5 HP<\/td><td>Add one size if floor-to-ceiling glass<\/td><\/tr><tr><td>Second bedroom<\/td><td>100 \u2013 150 sq ft<\/td><td>1.0 HP<\/td><td><\/td><\/tr><tr><td>Living + dining<\/td><td>300 \u2013 450 sq ft<\/td><td>2.0 \u2013 2.5 HP<\/td><td>Consider 2 units for L-shaped layouts<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Semi-D \/ Bungalow<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Room<\/th><th>Typical Size<\/th><th>Recommended HP<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>Master bedroom<\/td><td>250 \u2013 350 sq ft<\/td><td>2.0 \u2013 2.5 HP<\/td><td>Corner rooms with multiple sun-exposed walls need more<\/td><\/tr><tr><td>Living room<\/td><td>400 \u2013 600 sq ft<\/td><td>2.5 \u2013 3.0 HP<\/td><td>Consider a ceiling cassette for better air distribution<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If you are moving into a new home and planning your aircon installation, the right HP choice goes hand in hand with the <a href=\"https:\/\/www.recommend.my\/blog\/aircon-installation-price-calculator\/\">installation itself<\/a>. An experienced installer will do a site assessment and confirm the HP before you buy.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Does_the_Type_of_Aircon_Matter\"><\/span>Does the Type of Aircon Matter?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. The most common types in Malaysian homes are:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Wall-mounted split units<\/strong> are the standard choice for bedrooms and smaller rooms. They are the most affordable option and come in sizes from 1.0 HP to 3.0 HP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ceiling cassette units<\/strong> distribute air more evenly across a larger area, making them better suited for living rooms and open-plan spaces (350 sq ft and above). They are pricier to buy and install, but the difference in cooling comfort is noticeable for bigger rooms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are deciding between unit types, or wondering about things like <a href=\"https:\/\/www.recommend.my\/blog\/malaysia-house-3-phase-wiring\/\">3-phase wiring requirements<\/a> for running multiple aircons, it is worth talking to an installer before committing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also keep in mind that the type of <a href=\"https:\/\/www.recommend.my\/blog\/the-gas-that-cooled-and-harmed-the-world-for-100-years\/\">refrigerant gas your aircon uses<\/a> matters too. Newer R32 units are more efficient and environmentally friendly than older R22 systems. If your existing aircon still runs on R22, it might be time to consider a replacement.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Still_Not_Sure_Get_a_Professional_Assessment\"><\/span>Still Not Sure? Get a Professional Assessment<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"688\" height=\"384\" src=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/zGyf0PMjatr-usFRMYB6x_75RcGu38.png\" alt=\"Aircon installation by Recommend.my\" class=\"wp-image-27291\" srcset=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/zGyf0PMjatr-usFRMYB6x_75RcGu38.png 688w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/zGyf0PMjatr-usFRMYB6x_75RcGu38-538x300.png 538w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/zGyf0PMjatr-usFRMYB6x_75RcGu38-218x122.png 218w\" sizes=\"auto, (max-width: 688px) 100vw, 688px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If you have an unusual room layout, very high ceilings, or you are planning aircon for your entire home, a site survey by a qualified technician is always the best way to confirm your sizing. They can account for details that a formula cannot.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On Recommend.my, you can request a quote for <a href=\"https:\/\/www.recommend.my\/service\/air-conditioning\">aircon installation<\/a> and our verified pros will assess your space before recommending the right unit.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.recommend.my\/service\/air-conditioning\">Book Aircon Installation<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">We have served over <strong>24,700 customers<\/strong> for aircon services, with an overall rating of <strong>4.6 out of 5 stars<\/strong> from close to <strong>4,000 reviews<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here is what some recent customers had to say:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"847\" height=\"215\" src=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-17-163959.png\" alt=\"\" class=\"wp-image-27292\" srcset=\"https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-17-163959.png 847w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-17-163959-696x177.png 696w, https:\/\/www.recommend.my\/blog\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-17-163959-218x55.png 218w\" sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Asraf in Jenjarom, Jan 2026<\/strong>  \u2b50\u2b50\u2b50\u2b50\u2b50<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>&#8220;Very cheerful and full of smiles contractor. Mr Helmy explained in detail about the work as per request, troubleshoot correctly on the issue. The whole relocation process was smooth.&#8221;<\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-uagb-faq uagb-faq__outer-wrap uagb-block-2d6e167f uagb-faq-icon-row uagb-faq-layout-accordion uagb-faq-expand-first-true uagb-faq-inactive-other-true uagb-faq__wrap uagb-buttons-layout-wrap uagb-faq-equal-height     \" data-faqtoggle=\"true\" role=\"tablist\"><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-2cf4fa21 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">What HP aircon do I need for a 10 \u00d7 12 room?<\/span><\/div><div class=\"uagb-faq-content\"><p>A 10 \u00d7 12 room is 120 sq ft. A 1.0 HP aircon (approximately 9,000 BTU) is sufficient for this size, assuming standard ceiling height and no extreme sun exposure.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-61ceb7e5 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Is 1.0 HP enough for a bedroom?<\/span><\/div><div class=\"uagb-faq-content\"><p>For a standard Malaysian bedroom of up to 150 sq ft, yes. If the room is above 150 sq ft, faces west, or is on the top floor of a landed house, consider 1.5 HP.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-f9d7a73c \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">What is the difference between HP and BTU?<\/span><\/div><div class=\"uagb-faq-content\"><p>HP (horsepower) is the general category used in Malaysia, while BTU (British Thermal Unit) is the actual measurement of cooling output. 1.0 HP is approximately 9,000 BTU. When comparing models from different brands, check the BTU to get a more accurate picture.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-bdd98267 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Can I use a bigger aircon than recommended?<\/span><\/div><div class=\"uagb-faq-content\"><p>You can, but it is not ideal. An oversized aircon will cool the room very quickly and then shut off, cycling on and off frequently. This wastes energy, does not dehumidify properly, and can make the room feel clammy. It is better to match the aircon size to your room.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-337cace2 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Should I get an inverter or non-inverter aircon?<\/span><\/div><div class=\"uagb-faq-content\"><p>For rooms where the aircon runs for long periods (like bedrooms at night), an inverter unit is the better choice. It adjusts the compressor speed to maintain temperature without the start-stop cycling of non-inverter units, which saves energy over time.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-6f7ff7aa \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">How does aircon HP affect my electricity bill?<\/span><\/div><div class=\"uagb-faq-content\"><p>A higher HP aircon uses more electricity per hour. But an undersized aircon that runs nonstop can cost you more than a properly sized one that runs efficiently. We break down <a href=\"https:\/\/www.recommend.my\/blog\/aircon-electricity-cost-malaysia\/\">exactly how much your aircon costs per hour<\/a> using current TNB tariff rates.<\/p><\/div><\/div><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-a800fd93 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Do I need a different HP for a ceiling cassette vs a wall unit?<\/span><\/div><div class=\"uagb-faq-content\"><p>The HP sizing is based on room size, not the unit type. However, ceiling cassette units distribute air more evenly, which can make them feel more effective in larger or open-plan rooms.<\/p><\/div><\/div><\/div>\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.recommend.my\/service\/air-conditioning\">Book Aircon Installation<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Malaysia could be heading into its hottest year on record. In February 2026, climate experts warned that there is a 60 to 70 per cent chance El Ni\u00f1o will develop [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":27287,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_lmt_disableupdate":"","_lmt_disable":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[244],"tags":[726,727,728,661,725],"class_list":["post-27283","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-conditioner","tag-aircon-buying-guide","tag-aircon-hp","tag-btu","tag-calculator","tag-room-size"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What HP Aircon Size Do I Need for My Room? (Sizing Guide) - Recommend.my<\/title>\n<meta name=\"description\" content=\"Find the right aircon HP for your room size in Malaysia. Quick reference table, BTU calculator formula, and adjustment tips for high ceilings, sun-facing rooms, and open layouts.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.recommend.my\/blog\/what-hp-aircon-size-do-i-need-for-my-room-sizing-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What HP Aircon Size Do I Need for My Room? (Sizing Guide) - Recommend.my\" \/>\n<meta property=\"og:description\" content=\"Find the right aircon HP for your room size in Malaysia. 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