{"product_id":"keystone-18-500-18-200-btu-230v-window-wall-air-conditioner-with-16-000-btu-supplemental-heat-capability","title":"Keystone - 18,500\/18,200 BTU 230V Window\/Wall Air Conditioner with 16,000 BTU Supplemental Heat Capability  -  KSTHW18A","description":"\u003ch2\u003eKeystone - 18,500\/18,200 BTU 230V Window\/Wall Air Conditioner with 16,000 BTU Supplemental Heat Capability  -  KSTHW18A\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eAt Keystone, your family’s comfort starts here. Keystone's budget-friendly heat\/cool 230V window\/wall air conditioner is designed with a removable chassis so you can install it either in a window or through an exterior wall. Our two-in-one installation marvel includes an adjustable window kit for convenient window installation. For wall installation, you can use an existing compatible wall sleeve or purchase one of ours separately. In addition to cooling, this versatile unit also offers supplemental heat capability, providing you with an additional heat source to your main heat source when outdoor temperatures are above 45 degrees Fahrenheit. This unit requires a special 230-volt\/20-amp electrical outlet and will not operate with a standard 115V household electrical outlet. It is packed with money-saving features including energy saver mode, sleep mode and a programmable 24-hour timer. Add the convenience of our easy-to-use Follow Me LCD remote control, and everyone can relax in blissful comfort.\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eHeat\/Cool air conditioner with removable chassis for window and wall installation\u003c\/li\u003e\n\u003cli\u003eSpecial 230-volt\/20-amp electrical outlet required (Unit will not work with a standard 115V outlet)\u003c\/li\u003e\n\u003cli\u003e18,500\/18,200 BTU cooling capacity \/ 16,000 BTU supplemental heating capacity\u003c\/li\u003e\n\u003cli\u003eSupplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45°F\u003c\/li\u003e\n\u003cli\u003eDesigned for a room up to 1000 sq. ft. with dehumidification up to 3.8 pints per hour\u003c\/li\u003e\n\u003cli\u003eIndoor Noise Level dBA (Hi\/Med\/Lo): 60 \/ 57 \/ 54\u003c\/li\u003e\n\u003cli\u003eElectronic controls with LED display allows you to easily select options with the touch of a button\u003c\/li\u003e\n\u003cli\u003eTemperature sensing LCD remote control allows you control the temperature from across the room\u003c\/li\u003e\n\u003cli\u003eAuto-restart saves your settings for when power is restored to the unit\u003c\/li\u003e\n\u003cli\u003eAdjustable 4-way air flow direction allows you to easily control the direction of the cool air\u003c\/li\u003e\n\u003cli\u003e3 cooling speeds, 3 fan speeds, and 1 heat speed for multi-seasonal use\u003c\/li\u003e\n\u003cli\u003eProgrammable 24-hour on\/off timer cools on your schedule\u003c\/li\u003e\n\u003cli\u003eEnergy Saver function conserves energy and saves you money\u003c\/li\u003e\n\u003cli\u003eSleep function gradually increases room temperature after being activated\u003c\/li\u003e\n\u003cli\u003eEasy-clean, tilt-out mesh filter with Check Filter alert on the unit\u003c\/li\u003e\n\u003cli\u003e6.5-ft. LCDI power cord with NEMA 6-30P plug makes extension cords unnecessary\u003c\/li\u003e\n\u003cli\u003eAdjustable, pleated window mounting kit included for window installation\u003c\/li\u003e\n\u003cli\u003eMinimum window height: 18.5 inches\u003c\/li\u003e\n\u003cli\u003eWindow width dimensions: 28\" minimum \/ 40.5\" maximum\u003c\/li\u003e\n\u003cli\u003eU.L. safety listing (SA12388)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cul class=\"fa-ul mb-0\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/keystone\/pdf\/ksthw18a-spec.pdf\" target=\"_blank\"\u003eSpecification Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-pdf-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/keystone\/pdf\/ksthw18a-manual.pdf\" target=\"_blank\"\u003eProduct Manual\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-pdf-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/keystone\/pdf\/ksthw18a-warranty.pdf\" target=\"_blank\"\u003eWarranty Guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-pdf-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/keystone\/pdf\/ksthw18a-energy.pdf\" target=\"_blank\"\u003eEnergy Guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-pdf-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/keystone\/pdf\/ksthw18a_3.pdf\" target=\"_blank\"\u003eMiscellaneous\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-image-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/assetserver.net\/_assets\/_prop65\/shortform%20bpa_keystn.jpg\" target=\"_blank\"\u003eCA Prop 65 Warning Label\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci aria-hidden=\"true\" class=\"fa-li fa fa-file-pdf-o\"\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/access.almo.com\/Product\/PDF\/Prop65\/KEYSTN\/KSTHW18A\" target=\"_blank\"\u003eCA Prop 65 Retail POP\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul data-start=\"27\" data-end=\"1243\"\u003e\n\u003cli data-start=\"27\" data-end=\"281\"\u003e\n\u003cp data-start=\"29\" data-end=\"281\"\u003e\u003cstrong data-start=\"29\" data-end=\"60\"\u003eRobust, All‑Season Comfort:\u003c\/strong\u003e With up to \u003cstrong data-start=\"72\" data-end=\"134\"\u003e18,500\/18,200 BTU cooling and 16,000 BTU supplemental heat\u003c\/strong\u003e, this model handles both hot summers and cool transitions — a key search intent for \u003cem data-start=\"219\" data-end=\"240\"\u003eheat\/cool window AC\u003c\/em\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"282\" data-end=\"454\"\u003e\n\u003cp data-start=\"284\" data-end=\"454\"\u003e\u003cstrong data-start=\"284\" data-end=\"311\"\u003eLarge Area Performance:\u003c\/strong\u003e Designed for spaces up to ~1000 sq ft, matching buyer interest in \u003cem data-start=\"378\" data-end=\"413\"\u003epowerful AC units for large rooms\u003c\/em\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"455\" data-end=\"648\"\u003e\n\u003cp data-start=\"457\" data-end=\"648\"\u003e\u003cstrong data-start=\"457\" data-end=\"483\"\u003eFlexible Installation:\u003c\/strong\u003e Works as a \u003cstrong data-start=\"495\" data-end=\"518\"\u003ewindow or wall unit\u003c\/strong\u003e, offering more installation options — beneficial for \u003cem data-start=\"572\" data-end=\"599\"\u003eversatile AC installation\u003c\/em\u003e queries. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"649\" data-end=\"848\"\u003e\n\u003cp data-start=\"651\" data-end=\"848\"\u003e\u003cstrong data-start=\"651\" data-end=\"677\"\u003eUser‑Centric Controls:\u003c\/strong\u003e Temperature‑sensing LCD remote and programmable 24‑hour timer support convenience and align with \u003cem data-start=\"775\" data-end=\"793\"\u003esmart control AC\u003c\/em\u003e search trends. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"849\" data-end=\"1045\"\u003e\n\u003cp data-start=\"851\" data-end=\"1045\"\u003e\u003cstrong data-start=\"851\" data-end=\"878\"\u003eEnergy‑Saving Features:\u003c\/strong\u003e Sleep mode, energy saver mode, and auto‑restart help manage costs — a strong SEO match for \u003cem data-start=\"970\" data-end=\"1004\"\u003eenergy‑efficient air conditioner\u003c\/em\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1046\" data-end=\"1243\"\u003e\n\u003cp data-start=\"1048\" data-end=\"1243\"\u003e\u003cstrong data-start=\"1048\" data-end=\"1079\"\u003eEfficient Dehumidification:\u003c\/strong\u003e Removes up to 3.8 pints\/hour of moisture for greater comfort in humid environments — relevant for \u003cem data-start=\"1178\" data-end=\"1202\"\u003edehumidifying AC units\u003c\/em\u003e. \u003cspan class=\"\" data-state=\"delayed-open\" aria-describedby=\"radix-_r_4s_\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"119\" data-end=\"381\"\u003e\u003cstrong data-start=\"119\" data-end=\"162\"\u003eQ: What functions does this unit offer?\u003c\/strong\u003e\u003cbr data-start=\"162\" data-end=\"165\"\u003eA: This model provides \u003cstrong data-start=\"188\" data-end=\"228\"\u003epowerful cooling (18,500\/18,200 BTU)\u003c\/strong\u003e and \u003cstrong data-start=\"233\" data-end=\"270\"\u003esupplemental heating (16,000‑BTU)\u003c\/strong\u003e in a single unit — ideal for year‑round climate comfort in large spaces. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"383\" data-end=\"584\"\u003e\u003cstrong data-start=\"383\" data-end=\"424\"\u003eQ: What size room is it suitable for?\u003c\/strong\u003e\u003cbr data-start=\"424\" data-end=\"427\"\u003eA: It’s designed to \u003cstrong data-start=\"447\" data-end=\"489\"\u003eheat and cool rooms up to ~1,000 sq ft\u003c\/strong\u003e, such as large living rooms, open areas, and apartments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"586\" data-end=\"840\"\u003e\u003cstrong data-start=\"586\" data-end=\"629\"\u003eQ: How does the supplemental heat work?\u003c\/strong\u003e\u003cbr data-start=\"629\" data-end=\"632\"\u003eA: The \u003cstrong data-start=\"639\" data-end=\"663\"\u003e16,000 BTU heat mode\u003c\/strong\u003e provides additional warmth to support your primary heating system when outdoor temps are above ~45 °F; it’s \u003cstrong data-start=\"772\" data-end=\"801\"\u003enot a primary heat source\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"842\" data-end=\"1087\"\u003e\u003cstrong data-start=\"842\" data-end=\"901\"\u003eQ: What installation and power requirements are needed?\u003c\/strong\u003e\u003cbr data-start=\"901\" data-end=\"904\"\u003eA: It \u003cstrong data-start=\"910\" data-end=\"932\"\u003emounts in a window\u003c\/strong\u003e with an included kit and requires a \u003cstrong data-start=\"969\" data-end=\"1000\"\u003e230 V\/25 A dedicated outlet\u003c\/strong\u003e — \u003cem data-start=\"1003\" data-end=\"1048\"\u003eit will not operate on standard 115 V power\u003c\/em\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1089\" data-end=\"1375\"\u003e\u003cstrong data-start=\"1089\" data-end=\"1140\"\u003eQ: What comfort‑boosting features are included?\u003c\/strong\u003e\u003cbr data-start=\"1140\" data-end=\"1143\"\u003eA: Key features include \u003cstrong data-start=\"1167\" data-end=\"1187\"\u003e3 cooling speeds\u003c\/strong\u003e, \u003cstrong data-start=\"1189\" data-end=\"1205\"\u003e3 fan speeds\u003c\/strong\u003e, \u003cstrong data-start=\"1207\" data-end=\"1239\"\u003esleep and energy‑saver modes\u003c\/strong\u003e, \u003cstrong data-start=\"1241\" data-end=\"1271\"\u003eprogrammable 24‑hour timer\u003c\/strong\u003e, \u003cstrong data-start=\"1273\" data-end=\"1290\"\u003e4‑way airflow\u003c\/strong\u003e, and \u003cstrong data-start=\"1296\" data-end=\"1336\"\u003edehumidification up to ~3.8 pints\/hr\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1377\" data-end=\"1584\"\u003e\u003cstrong data-start=\"1377\" data-end=\"1419\"\u003eQ: Does it come with a remote control?\u003c\/strong\u003e\u003cbr data-start=\"1419\" data-end=\"1422\"\u003eA: Yes — it includes a \u003cstrong data-start=\"1445\" data-end=\"1479\"\u003etemperature‑sensing LCD remote\u003c\/strong\u003e that measures room temp where you are for precise comfort control. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1586\" data-end=\"1786\"\u003e\u003cstrong data-start=\"1586\" data-end=\"1617\"\u003eQ: How easy is maintenance?\u003c\/strong\u003e\u003cbr data-start=\"1617\" data-end=\"1620\"\u003eA: The unit features an \u003cstrong data-start=\"1644\" data-end=\"1679\"\u003eeasy‑clean tilt‑out mesh filter\u003c\/strong\u003e with a \u003cstrong data-start=\"1687\" data-end=\"1709\"\u003eCheck Filter alert\u003c\/strong\u003e to remind you when it’s time to clean. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:c2043335-b710-47e9-9900-329715fdbce6-16\" data-testid=\"conversation-turn-34\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"9f95fa6f-517c-48cc-a67b-ad69570e0470\" dir=\"auto\" data-message-model-slug=\"gpt-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cul data-start=\"0\" data-end=\"474\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"0\" data-end=\"98\"\u003e\n\u003cp data-start=\"2\" data-end=\"98\"\u003eClean the washable air filter every 30 days to maintain airflow and heating\/cooling efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"99\" data-end=\"191\"\u003e\n\u003cp data-start=\"101\" data-end=\"191\"\u003eVacuum or gently brush evaporator and condenser coils seasonally to prevent dust buildup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"192\" data-end=\"246\"\u003e\n\u003cp data-start=\"194\" data-end=\"246\"\u003eKeep rear and side vents clear for optimal airflow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"247\" data-end=\"321\"\u003e\n\u003cp data-start=\"249\" data-end=\"321\"\u003eCheck and clear drain openings to prevent water buildup during cooling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"322\" data-end=\"401\"\u003e\n\u003cp data-start=\"324\" data-end=\"401\"\u003eEnsure window or wall installation is properly sealed to reduce energy loss\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"402\" data-end=\"474\" data-is-last-node=\"\"\u003e\n\u003cp data-start=\"404\" data-end=\"474\" data-is-last-node=\"\"\u003eUnplug, clean, and cover the unit during off-season to extend lifespan\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Keystone","offers":[{"title":"Default Title","offer_id":45273336053951,"sku":"KSTHW18A","price":531.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/keystone-window-a-c-keystone-18-500-18-200-btu-230v-window-wall-air-conditioner-with-16-000-btu-supplemental-heat-capability-192487126882-28692784054409.jpg?v=1773242036","url":"https:\/\/backyardprovider.com\/products\/keystone-18-500-18-200-btu-230v-window-wall-air-conditioner-with-16-000-btu-supplemental-heat-capability","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}