{"product_id":"mrcool-diy-5th-gen-12000-btu-mini-split","title":"MRCOOL DIY 5th Gen 12,000 BTU Mini-Split | Up to 550 Sq Ft, 115V, No Technician Required","description":"\u003cdiv class=\"hh-buyer-fit\" data-karr-block=\"last30days-2026-06-02\"\u003e\n  \u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Bedrooms, offices, cabins, additions, and smaller shop spaces that need a practical DIY heat-pump setup.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWhy people buy it:\u003c\/strong\u003e MRCOOL DIY gives capable buyers a way to install a ductless system without opening refrigerant lines.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWatch out for:\u003c\/strong\u003e Most regrets come from poor sizing, bad placement, electrical assumptions, or sloppy condensate routing. Plan those before you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eThe 12,000 BTU is the most popular size in the MRCOOL DIY line for a reason. It handles a single large room, a cabin great room, a converted garage, or a 550-square-foot off-grid living space on a standard 115V circuit. The 5th Generation adds R-454B refrigerant with a built-in leak sensor, improved efficiency ratings, and the same pre-charged quick-connect line set that made the original DIY a category favorite. No HVAC contractor needed at any point in the process.\u003c\/p\u003e\n\n\u003ch2\u003eMRCOOL DIY 12,000 BTU Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue DIY installation\u003c\/strong\u003e — pre-charged R-454B line set; quick-connect fittings that don't require a vacuum pump or refrigerant handling certification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -13°F\u003c\/strong\u003e — heat pump operation in sub-zero conditions; viable for year-round off-grid heating in cold climates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20+ SEER2 efficiency\u003c\/strong\u003e — pairs well with solar setups from Renogy or BLUETTI; significantly lower operating cost than resistance heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115V operation\u003c\/strong\u003e — runs on a standard 20-amp household circuit; no panel upgrade needed in most installations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi and voice control\u003c\/strong\u003e — MRCOOL Smart HVAC app (iOS\/Android), Google Assistant and Alexa compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold Fin condenser coil\u003c\/strong\u003e — corrosion-resistant coating; rated for coastal and high-humidity environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2L refrigerant leak sensor\u003c\/strong\u003e — built-in alarm monitors for R-454B leaks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet operation\u003c\/strong\u003e — indoor air handler designed for low noise; suitable for bedrooms and living areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 550 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e115V, 60Hz, 1PH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRefrigerant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eR-454B (pre-charged)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Line Set Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Line Set Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Operating Temp (Heating)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-13°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIY-12-HP-WM-115D25-O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL, ETL, AHRI, Energy Star\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 years parts \/ 7 years compressor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIndoor wall-mount air handler\u003c\/li\u003e\n\u003cli\u003eOutdoor condenser unit (pre-charged with R-454B)\u003c\/li\u003e\n\u003cli\u003e25 ft pre-charged quick-connect line set\u003c\/li\u003e\n\u003cli\u003eSmart HVAC Controller Module (WiFi)\u003c\/li\u003e\n\u003cli\u003eDIYPro cable\u003c\/li\u003e\n\u003cli\u003eRemote control\u003c\/li\u003e\n\u003cli\u003eInstallation hardware and mounting plate\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MRCOOL","offers":[{"title":"Default Title","offer_id":48526269972735,"sku":"DIY-12-HP-WM-115D25-O","price":2359.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0815\/5450\/5983\/files\/Hero_zqosk5.png?v=1778795222","url":"https:\/\/homesteadheavy.com\/products\/mrcool-diy-5th-gen-12000-btu-mini-split","provider":"Homestead Heavy","version":"1.0","type":"link"}