{"product_id":"mrcool-diy-5th-gen-18000-btu-mini-split","title":"MRCOOL DIY 5th Gen 18,000 BTU Mini-Split | Up to 800 Sq Ft, 230V, 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 Larger rooms, workshops, cabins, and additions where 18K BTU capacity is a better fit than undersizing.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWhy people buy it:\u003c\/strong\u003e Strong ductless heating and cooling with a pre-charged DIY line-set system.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWatch out for:\u003c\/strong\u003e Confirm load, electrical service, line-set length, wall placement, and drainage. A mini split is DIY-friendly, not idiot-proof.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eAt 18,000 BTU, this unit handles mid-size off-grid homes, large open-plan cabins, and workshops up to 800 square feet. The step up to 230V gives you more output capacity while keeping installation within DIY reach: the pre-charged quick-connect line set still requires no vacuum pump, no refrigerant certification, and no licensed HVAC contractor. If you're heating and cooling a full living space on solar power, the 18K is where the size-to-efficiency ratio starts making serious sense.\u003c\/p\u003e\n\n\u003ch2\u003eMRCOOL DIY 18,000 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 with quick-connect fittings; no specialized tools or HVAC license needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -13°F\u003c\/strong\u003e — full heat pump operation in extreme cold; engineered for year-round use in northern climates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-efficiency 230V operation\u003c\/strong\u003e — runs on a dedicated 30-amp, 230V circuit; higher output without sacrificing efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi and app control\u003c\/strong\u003e — MRCOOL Smart HVAC app on iOS and Android; Google Assistant and Alexa compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold Fin condenser coil\u003c\/strong\u003e — corrosion-resistant coating for long outdoor unit life in humidity, rain, and salt air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2L refrigerant leak detection\u003c\/strong\u003e — built-in alarm sensor; compliant with updated R-454B safety requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 ft included line set\u003c\/strong\u003e — pre-charged and ready; max run of 82 ft for flexible placement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy Star certified\u003c\/strong\u003e — qualifies for federal and state energy efficiency rebates in eligible 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\u003e18,000 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\u003e18,000 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 800 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\u003e208-230V, 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-18-HP-WM-230D25-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":48526270005503,"sku":"DIY-18-HP-WM-230D25-O","price":2909.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0815\/5450\/5983\/files\/mrcool_5th-gen_introducing_xl_fu3o61_a8eff402-5972-496e-9e50-3be245e324cb.jpg?v=1778795239","url":"https:\/\/homesteadheavy.com\/products\/mrcool-diy-5th-gen-18000-btu-mini-split","provider":"Homestead Heavy","version":"1.0","type":"link"}