{"id":2660,"date":"2026-03-03T23:37:38","date_gmt":"2026-03-03T21:37:38","guid":{"rendered":"https:\/\/nature-o.net\/?page_id=2660"},"modified":"2026-03-09T13:29:32","modified_gmt":"2026-03-09T11:29:32","slug":"dehumidifier-size-calculator","status":"publish","type":"page","link":"https:\/\/nature-o.net\/?page_id=2660","title":{"rendered":"Dehumidifier Size Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-dehum-6a3f9\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Dehumidifier Size Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate the dehumidifier capacity you may need for a room (simplified guidance, not a guarantee).\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-dehum-form-6a3f9\" novalidate>\n    <div class=\"eco-tool__grid3\">\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-area-6a3f9\">Room area<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-dehum-area-6a3f9\" type=\"number\" min=\"0\" step=\"0.1\" value=\"20\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Enter the floor area of the room.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-unit-6a3f9\">Area unit<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dehum-unit-6a3f9\">\n          <option value=\"m2\" selected>m\u00b2<\/option>\n          <option value=\"ft2\">ft\u00b2<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">We convert to m\u00b2 internally.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-height-6a3f9\">Ceiling height (m)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-dehum-height-6a3f9\" type=\"number\" min=\"1.8\" step=\"0.05\" value=\"2.5\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Typical: 2.4\u20132.8 m.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-now-6a3f9\">Current humidity (%)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-dehum-now-6a3f9\" type=\"number\" min=\"20\" max=\"100\" step=\"1\" value=\"70\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">If you don\u2019t know, use a hygrometer reading.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-target-6a3f9\">Target humidity (%)<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dehum-target-6a3f9\">\n          <option value=\"60\">60 (basic comfort)<\/option>\n          <option value=\"55\">55<\/option>\n          <option value=\"50\" selected>50 (typical target)<\/option>\n          <option value=\"45\">45 (drier)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Many homes aim for ~45\u201355% RH.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dehum-temp-6a3f9\">Room temperature<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dehum-temp-6a3f9\">\n          <option value=\"cool\">Cool (\u2264 18\u00b0C)<\/option>\n          <option value=\"normal\" selected>Normal (19\u201324\u00b0C)<\/option>\n          <option value=\"warm\">Warm (\u2265 25\u00b0C)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Colder rooms usually need more efficient units.<\/div>\n      <\/div>\n\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-dehum-calc-6a3f9\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-dehum-reset-6a3f9\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-dehum-error-6a3f9\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-dehum-result-6a3f9\" 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\">Recommended capacity<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-dehum-lpd-6a3f9\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-dehum-lpdsub-6a3f9\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Suggested size class<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-dehum-class-6a3f9\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-dehum-classsub-6a3f9\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Note<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"eco-dehum-note-6a3f9\"><\/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__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,.2);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit}\n.eco-tool select.eco-tool__input{appearance:none;-webkit-appearance:none;line-height:44px;padding-right:40px;background-image:linear-gradient(45deg, transparent 50%, rgba(0,0,0,.60) 50%),linear-gradient(135deg, rgba(0,0,0,.60) 50%, transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat}\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,.2)!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;margin-top:16px;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=\"6a3f9\";\n  const el=id=>document.getElementById(id+\"-\"+S);\n\n  const areaEl=el(\"eco-dehum-area\");\n  const unitEl=el(\"eco-dehum-unit\");\n  const hEl=el(\"eco-dehum-height\");\n  const nowEl=el(\"eco-dehum-now\");\n  const targetEl=el(\"eco-dehum-target\");\n  const tempEl=el(\"eco-dehum-temp\");\n\n  const calcBtn=el(\"eco-dehum-calc\");\n  const resetBtn=el(\"eco-dehum-reset\");\n  const errEl=el(\"eco-dehum-error\");\n\n  const resEl=el(\"eco-dehum-result\");\n  const lpdOut=el(\"eco-dehum-lpd\");\n  const lpdSub=el(\"eco-dehum-lpdsub\");\n  const classOut=el(\"eco-dehum-class\");\n  const classSub=el(\"eco-dehum-classsub\");\n  const noteOut=el(\"eco-dehum-note\");\n\n  function setError(m){ errEl.textContent=m||\"\"; }\n  function toM2(v,u){ return u===\"ft2\" ? v*0.09290304 : v; }\n  function fmt(x,d){\n    return x.toLocaleString(undefined,{minimumFractionDigits:d,maximumFractionDigits:d});\n  }\n\n  function tempMult(x){\n    if(x===\"cool\") return 1.15;\n    if(x===\"warm\") return 0.95;\n    return 1.0;\n  }\n\n  function sizeClass(lpd){\n    if(lpd <= 10) return {c:\"Small\", s:\"Good for bedrooms and small rooms.\"};\n    if(lpd <= 20) return {c:\"Medium\", s:\"Good for living rooms \/ apartments.\"};\n    if(lpd <= 30) return {c:\"Large\", s:\"Good for basements and large spaces.\"};\n    return {c:\"Extra large\", s:\"Consider higher capacity or multiple units.\"};\n  }\n\n  calcBtn.addEventListener(\"click\", function(){\n    setError(\"\");\n\n    const area=Number(areaEl.value);\n    const height=Number(hEl.value);\n    const now=Number(nowEl.value);\n    const target=Number(targetEl.value);\n\n    if(!Number.isFinite(area)||area<0){ setError(\"Please enter a valid room area (0+).\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(height)||height<=0){ setError(\"Please enter a valid ceiling height (>0).\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(now)||now<20||now>100){ setError(\"Please enter current humidity (20\u2013100%).\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(target)||target<30||target>70){ setError(\"Please choose a target humidity (30\u201370%).\"); resEl.hidden=true; return; }\n    if(now <= target){ setError(\"Current humidity should be higher than the target for meaningful sizing.\"); resEl.hidden=true; return; }\n\n    const m2 = toM2(area, unitEl.value);\n    const volume = m2 * height;\n    const delta = now - target;\n\n    let base = (volume * delta) \/ 25;\n    base *= tempMult(tempEl.value);\n\n    const lpd = Math.max(5, Math.min(60, base));\n\n    lpdOut.textContent = `${Math.round(lpd).toLocaleString()} L\/day`;\n    lpdSub.textContent = `Room volume: ${fmt(volume,1)} m\u00b3 \u2022 Humidity reduction: ${Math.round(delta).toLocaleString()}%`;\n\n    const sc = sizeClass(lpd);\n    classOut.textContent = sc.c;\n    classSub.textContent = sc.s;\n\n    noteOut.textContent =\n      \"This is a simplified estimate. Real sizing depends on air leakage, moisture sources, temperature, and unit efficiency. If you have persistent dampness or mold, address the cause.\";\n\n    resEl.hidden=false;\n  });\n\n  resetBtn.addEventListener(\"click\", function(){\n    setError(\"\");\n    areaEl.value=\"20\";\n    unitEl.value=\"m2\";\n    hEl.value=\"2.5\";\n    nowEl.value=\"70\";\n    targetEl.value=\"50\";\n    tempEl.value=\"normal\";\n    resEl.hidden=true;\n  });\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Dehumidifier Size Calculator Estimate the dehumidifier capacity you may need for a room (simplified guidance, not a guarantee). Room area Enter the floor area of the room. Area unit m\u00b2ft\u00b2&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\/2660"}],"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=2660"}],"version-history":[{"count":2,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2660\/revisions"}],"predecessor-version":[{"id":2704,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2660\/revisions\/2704"}],"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=2660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}