{"id":2972,"date":"2026-04-10T19:07:14","date_gmt":"2026-04-10T17:07:14","guid":{"rendered":"https:\/\/nature-o.net\/?page_id=2972"},"modified":"2026-04-10T19:07:15","modified_gmt":"2026-04-10T17:07:15","slug":"ac-vs-fan-energy-calculator","status":"publish","type":"page","link":"https:\/\/nature-o.net\/?page_id=2972","title":{"rendered":"AC vs Fan Energy Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-ac-y64n2\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">AC vs Fan Energy Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Compare air conditioner and fan energy use, cost, and CO\u2082 footprint for the same cooling time.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-ac-form-y64n2\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"hours-y64n2\">Cooling hours<br>per day<\/label>\n        <input class=\"eco-tool__input\" id=\"hours-y64n2\" type=\"number\" min=\"1\" step=\"1\" value=\"8\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Average daily cooling time.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"days-y64n2\">Hot days<br>per month<\/label>\n        <input class=\"eco-tool__input\" id=\"days-y64n2\" type=\"number\" min=\"1\" max=\"31\" step=\"1\" value=\"20\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Days when cooling is needed.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ac-y64n2\">AC power<br>(kW)<\/label>\n        <input class=\"eco-tool__input\" id=\"ac-y64n2\" type=\"number\" min=\"0.2\" step=\"0.1\" value=\"1.2\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Typical room AC: 0.8\u20131.5 kW.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"fan-y64n2\">Fan power<br>(kW)<\/label>\n        <input class=\"eco-tool__input\" id=\"fan-y64n2\" type=\"number\" min=\"0.01\" step=\"0.01\" value=\"0.07\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Typical fan: 0.04\u20130.09 kW.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"price-y64n2\">Electricity price<br>(per kWh)<\/label>\n        <input class=\"eco-tool__input\" id=\"price-y64n2\" type=\"number\" min=\"0\" step=\"0.01\" value=\"0.20\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Your local electricity price.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"co2-y64n2\">Grid CO\u2082 factor<\/label>\n        <select class=\"eco-tool__input\" id=\"co2-y64n2\">\n          <option value=\"0.10\">Low (renewable)<\/option>\n          <option value=\"0.40\" selected>Mixed<\/option>\n          <option value=\"0.80\">High (coal)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Used for CO\u2082 estimate.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"calc-y64n2\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"reset-y64n2\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"error-y64n2\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"result-y64n2\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Result<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Air conditioner<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"acout-y64n2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"accost-y64n2\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Fan<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"fanout-y64n2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"fancost-y64n2\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Potential savings<\/div>\n      <div class=\"eco-tool__metric-value\" id=\"saved-y64n2\">\u2014<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"tip-y64n2\"><\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:16px;}\n.eco-tool__header{margin-bottom:12px;}\n.eco-tool__title{margin:0 0 8px;}\n.eco-tool__lead{margin:0;opacity:.9;}\n.eco-tool__form{margin-top:12px;}\n.eco-tool__grid3{display:grid;grid-template-columns:1fr;gap:16px;}\n@media (min-width:860px){.eco-tool__grid3{grid-template-columns:1fr 1fr 1fr;}}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px;}\n.eco-tool__label{font-weight:600;}\n.eco-tool__input{width:100%;height:44px;padding:0 12px;border:1px solid rgba(0,0,0,.20);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit;}\n.eco-tool select.eco-tool__input{\nappearance:none;-webkit-appearance:none;line-height:44px;padding-right:40px;\nbackground-image:\nlinear-gradient(45deg, transparent 50%, rgba(0,0,0,.60) 50%),\nlinear-gradient(135deg, rgba(0,0,0,.60) 50%, transparent 50%);\nbackground-position:calc(100% - 18px) 50%, calc(100% - 12px) 50%;\nbackground-size:6px 6px;background-repeat:no-repeat;\n}\n.eco-tool__hint{font-size:.92em;opacity:.78;min-height:38px;}\n.eco-tool__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px;}\n.eco-tool__btn{padding:10px 22px;}\n.eco-tool__btn--ghost{background:transparent !important;border:1px solid rgba(0,0,0,.20) !important;}\n.eco-tool__btn--ghost:hover,.eco-tool__btn--ghost:focus{background:rgba(0,0,0,.06) !important;border-color:rgba(0,0,0,.35) !important;}\n.eco-tool__error{min-height:1.2em;font-weight:600;flex:1 1 240px;}\n.eco-tool__result{margin-top:16px;}\n.eco-tool__subtitle{margin:0 0 10px;}\n.eco-tool__cards{display:grid;gap:10px;grid-template-columns:1fr;}\n@media (min-width:860px){.eco-tool__cards{grid-template-columns:1fr 1fr;}}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px;}\n.eco-tool__card--wide{margin-top:10px;}\n.eco-tool__metric-label{opacity:.85;font-weight:600;}\n.eco-tool__metric-value{font-size:1.6em;font-weight:800;margin-top:6px;line-height:1.1;}\n.eco-tool__metric-sub{opacity:.85;margin-top:6px;}\n<\/style>\n\n<script>\n(function(){\n  const S = \"y64n2\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const hoursEl = el(\"hours\");\n  const daysEl = el(\"days\");\n  const acEl = el(\"ac\");\n  const fanEl = el(\"fan\");\n  const priceEl = el(\"price\");\n  const co2El = el(\"co2\");\n\n  const calcBtn = el(\"calc\");\n  const resetBtn = el(\"reset\");\n  const errorEl = el(\"error\");\n  const resultEl = el(\"result\");\n\n  const acoutEl = el(\"acout\");\n  const accostEl = el(\"accost\");\n  const fanoutEl = el(\"fanout\");\n  const fancostEl = el(\"fancost\");\n  const savedEl = el(\"saved\");\n  const tipEl = el(\"tip\");\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n  function fmt(n){\n    return (Math.round(n * 10) \/ 10).toLocaleString(undefined,{minimumFractionDigits:1,maximumFractionDigits:1});\n  }\n\n  function calculate(){\n    setError(\"\");\n\n    const hours = Number(hoursEl.value);\n    const days = Number(daysEl.value);\n    const ac = Number(acEl.value);\n    const fan = Number(fanEl.value);\n    const price = Number(priceEl.value);\n    const co2 = Number(co2El.value);\n\n    if (!Number.isFinite(hours) || hours <= 0){ setError(\"Please enter valid hours.\"); resultEl.hidden = true; return; }\n    if (!Number.isFinite(days) || days <= 0 || days > 31){ setError(\"Please enter days from 1 to 31.\"); resultEl.hidden = true; return; }\n    if (!Number.isFinite(ac) || ac <= 0){ setError(\"Please enter valid AC power.\"); resultEl.hidden = true; return; }\n    if (!Number.isFinite(fan) || fan <= 0){ setError(\"Please enter valid fan power.\"); resultEl.hidden = true; return; }\n    if (!Number.isFinite(price) || price < 0){ setError(\"Please enter valid electricity price.\"); resultEl.hidden = true; return; }\n\n    const acKwh = hours * days * ac;\n    const fanKwh = hours * days * fan;\n\n    const acCost = acKwh * price;\n    const fanCost = fanKwh * price;\n\n    const acCo2 = acKwh * co2;\n    const fanCo2 = fanKwh * co2;\n\n    const savedKwh = acKwh - fanKwh;\n    const savedCost = acCost - fanCost;\n    const savedCo2 = acCo2 - fanCo2;\n\n    acoutEl.textContent = `${fmt(acKwh)} kWh \/ month`;\n    accostEl.textContent = `${fmt(acCost)} cost \u2022 ${fmt(acCo2)} kg CO\u2082`;\n\n    fanoutEl.textContent = `${fmt(fanKwh)} kWh \/ month`;\n    fancostEl.textContent = `${fmt(fanCost)} cost \u2022 ${fmt(fanCo2)} kg CO\u2082`;\n\n    savedEl.textContent = `${fmt(savedKwh)} kWh saved \/ month`;\n    tipEl.textContent = `${fmt(savedCost)} cost and ${fmt(savedCo2)} kg CO\u2082 saved by using a fan instead of AC for the same time.`;\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    hoursEl.value = \"8\";\n    daysEl.value = \"20\";\n    acEl.value = \"1.2\";\n    fanEl.value = \"0.07\";\n    priceEl.value = \"0.20\";\n    co2El.value = \"0.40\";\n    resultEl.hidden = true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>AC vs Fan Energy Calculator Compare air conditioner and fan energy use, cost, and CO\u2082 footprint for the same cooling time. Cooling hoursper day Average daily cooling time. Hot daysper&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2452,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2972"}],"collection":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2972"}],"version-history":[{"count":1,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2972\/revisions"}],"predecessor-version":[{"id":2973,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2972\/revisions\/2973"}],"up":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2452"}],"wp:attachment":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}