{"product_id":"mrcool-diy-5th-gen-3-zone-mini-split","title":"MRCOOL DIY 5th Gen 3-Zone Mini-Split System | Climate Control for Three Rooms, 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 Multi-room cabins, additions, and small homes where three independent zones make sense.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWhy people buy it:\u003c\/strong\u003e Zoned comfort without ductwork and without opening refrigerant lines.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWatch out for:\u003c\/strong\u003e Three-zone systems require real planning. If you are not comfortable sizing rooms and routing multiple line sets, get help before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eThree rooms, three different temperatures, one outdoor unit, one installation project. The MRCOOL DIY 5th Gen 3-zone system is built for off-grid homes and homesteads where different spaces have different needs: a cooler bedroom, a warmer main living area, a workshop that only runs when you're out there. Each air handler operates independently. Each uses the same pre-charged quick-connect line set that makes MRCOOL the go-to DIY mini-split for people who want to do this themselves without compromising on system quality.\u003c\/p\u003e\n\n\u003ch2\u003eMRCOOL DIY 3-Zone System Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree independent zones\u003c\/strong\u003e — each air handler runs independently with its own temperature setting; no zone affects another\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue DIY installation\u003c\/strong\u003e — pre-charged R-454B quick-connect line sets for all three zones; no vacuum pump, no refrigerant license\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -13°F\u003c\/strong\u003e — cold-climate heat pump across all zones simultaneously\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle 230V outdoor condenser\u003c\/strong\u003e — one outdoor unit for all three zones; less exterior equipment, less installation work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi and per-zone app control\u003c\/strong\u003e — MRCOOL Smart HVAC app; control and schedule each zone from your phone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold Fin condenser coil\u003c\/strong\u003e — corrosion-resistant outdoor unit for all climate conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong upsell path to 4-zone\u003c\/strong\u003e — if you need a fourth room later, MRCOOL's multi-zone platform scales\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone Count\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 zones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal System Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 18,000 BTU (condenser)\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 750 sq ft total (distributed across zones)\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 line sets)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondenser Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIY-MULTI3-18HP230D-O\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\u003eAvailable Air Handler Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9K, 12K BTU per zone\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\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\u003e1x 18,000 BTU outdoor multi-zone condenser (DIY-MULTI3-18HP230D-O)\u003c\/li\u003e\n\u003cli\u003e3x indoor wall-mount air handlers (BTU sizes per selected configuration)\u003c\/li\u003e\n\u003cli\u003e3x pre-charged quick-connect line sets (25 ft each)\u003c\/li\u003e\n\u003cli\u003eSmart HVAC Controller Modules (WiFi) for each zone\u003c\/li\u003e\n\u003cli\u003eRemote controls for each zone\u003c\/li\u003e\n\u003cli\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MRCOOL","offers":[{"title":"Default Title","offer_id":48526270202111,"sku":"MRCOOL-DIY-3ZONE","price":3500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0815\/5450\/5983\/files\/hyper_heat_condenser_lit_r2ekeb_23dbbb22-1f6a-478b-9253-e634a2f00f21.png?v=1778795303","url":"https:\/\/homesteadheavy.com\/products\/mrcool-diy-5th-gen-3-zone-mini-split","provider":"Homestead Heavy","version":"1.0","type":"link"}