{"product_id":"mrcool-diy-5th-gen-4-zone-54-000-btu-ductless-mini-split-air-conditioner-heat-pump-9k-9k-18k-18k-diy4-b-55hp09091818","title":"MRCOOL DIY 5th Gen 4-Zone 54,000 BTU Ductless Mini Split Air Conditioner \u0026 Heat Pump (9K+9K+18K+18K), DIY4-B-55HP09091818","description":"\u003cstyle\u003e\n.iron-theme{--black:#0b0b0b;--gray:#6b7280;--red:#c1121f;--red2:#e11d2e;--border:#e5e7eb;--soft:#f8fafc;font-family:Arial,Helvetica,sans-serif;color:var(--black);max-width:1100px;margin:0 auto;line-height:1.7;}\n.shell{border:1px solid var(--border);border-radius:16px;overflow:hidden;background:#fff;box-shadow:0 10px 28px rgba(0,0,0,.08);}\n.top{padding:24px;} .kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--gray);margin:0 0 8px;}\n.sub{margin:12px 0 0;font-size:15px;max-width:100ch;}\n.stripe{height:8px;background:linear-gradient(90deg,var(--red) 0%,var(--red) 70%,var(--red2) 100%);}\n.content{padding:24px;background:var(--soft);}\n.card{border:1px solid var(--border);border-radius:16px;background:#fff;padding:20px;margin:18px 0;box-shadow:0 8px 22px rgba(0,0,0,.06);}\nh2{margin:0 0 12px;font-size:19px;font-weight:900;text-transform:uppercase;display:flex;align-items:center;gap:10px;}\nh2:before{content:\"\";width:10px;height:10px;background:var(--red);border-radius:2px;}\nul{margin:0;padding-left:20px;} ul li{margin:8px 0;}\ntable{width:100%;border-collapse:collapse;font-size:14px;}\nth, td{border:1px solid var(--border);padding:10px;text-align:left;}\nth{background:#f3f4f6;font-size:12px;text-transform:uppercase;font-weight:900;}\n.callout{border:1px dashed rgba(193,18,31,.5);background:rgba(193,18,31,.06);border-radius:12px;padding:14px;font-size:14px;margin-top:12px;}\n\u003c\/style\u003e\n\u003csection class=\"iron-theme\"\u003e\n\u003cdiv class=\"shell\"\u003e\n\u003cdiv class=\"top\"\u003e\n\u003cp class=\"kicker\"\u003e54,000 BTU Connected Capacity • Twin Bedroom Zoning • 6-Zone Capable Condenser\u003c\/p\u003e\n\u003ch2\u003eMRCOOL® DIY® 5th Gen 4-Zone Wall Mount Mini Split (9K+9K+18K+18K)\u003c\/h2\u003e\n\u003cp class=\"sub\"\u003eThe \u003cstrong\u003eMRCOOL® DIY® 5th Generation 54,000 BTU 4-Zone Wall Mount Mini Split\u003c\/strong\u003e pairs a 6-zone capable 55K BTU condenser with two matched 9K and two matched 18K wall mount air handlers. Two bedrooms round out this system alongside two large open living areas, with headroom to add two more zones later. Ships with 25 ft pre-charged line sets on every zone; longer runs available on request.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stripe\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"content\"\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eSystem Highlights\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwin Bedroom Zoning:\u003c\/strong\u003e Two matched 9K air handlers at 400 sq. ft. each, plus two matched 18K units at up to 1,000 sq. ft. each.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Expansion Headroom:\u003c\/strong\u003e The 55K condenser supports up to six zones, leaving two ports open for future handlers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue DIY Installation:\u003c\/strong\u003e Patented pre-charged Quick Connect® line sets eliminate vacuuming, charging, and professional trade labor. Every line set in this kit includes the DIYPro® cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Control:\u003c\/strong\u003e Wireless remotes, the SmartHVAC app for iOS and Android, plus Amazon Alexa and Google Assistant support out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × DIY-MULTI6-55HP230D-O — 55K BTU Multi-Zone Condenser, 230V (6-zone capable)\u003c\/li\u003e\n\u003cli\u003e2 × DIY-09-HP-WMAH-230D25-O — 9K BTU Wall Mount Air Handler, 230V\u003c\/li\u003e\n\u003cli\u003e2 × DIY-18-HP-WMAH-230D25-O — 18K BTU Wall Mount Air Handler, 230V\u003c\/li\u003e\n\u003cli\u003e2 × Pre-charged 25 ft 1\/4\" × 3\/8\" Quick Connect® line sets with DIYPro® cable (9K zones)\u003c\/li\u003e\n\u003cli\u003e2 × Pre-charged 25 ft 1\/4\" × 1\/2\" Quick Connect® line sets with DIYPro® cable (18K zones)\u003c\/li\u003e\n\u003cli\u003eWireless remotes, mounting hardware, and installation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eCondenser Specifications — DIY-MULTI6-55HP230D-O\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCooling \/ Heating Capacity\u003c\/th\u003e\n\u003ctd\u003e52,000 BTU \/ 55,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTonnage\u003c\/th\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eZone Capacity\u003c\/th\u003e\n\u003ctd\u003e6 (4 used in this kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrical\u003c\/th\u003e\n\u003ctd\u003e208–230V, 1 Phase, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefrigerant\u003c\/th\u003e\n\u003ctd\u003eR-454B (pre-charged)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompressor \/ Inverter\u003c\/th\u003e\n\u003ctd\u003eRotary \/ DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Total Line Set Length\u003c\/th\u003e\n\u003ctd\u003e221.4 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eZone Configuration\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eZone\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCapacity \u0026amp; Coverage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZone 1\u003c\/td\u003e\n\u003ctd\u003eDIY-09-HP-WMAH-230D25-O\u003c\/td\u003e\n\u003ctd\u003e9,000 BTU — up to 400 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZone 2\u003c\/td\u003e\n\u003ctd\u003eDIY-09-HP-WMAH-230D25-O\u003c\/td\u003e\n\u003ctd\u003e9,000 BTU — up to 400 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZone 3\u003c\/td\u003e\n\u003ctd\u003eDIY-18-HP-WMAH-230D25-O\u003c\/td\u003e\n\u003ctd\u003e18,000 BTU — up to 1,000 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZone 4\u003c\/td\u003e\n\u003ctd\u003eDIY-18-HP-WMAH-230D25-O\u003c\/td\u003e\n\u003ctd\u003e18,000 BTU — up to 1,000 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 14px; margin-top: 12px;\"\u003eZones 1–2 use 1\/4\" liquid × 3\/8\" suction line sets. Zones 3–4 use 1\/4\" liquid × 1\/2\" suction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eEngineering \u0026amp; Warranty\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold Fin® Corrosion Protection\u003c\/strong\u003e against humidity and coastal salt exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Inverter Drive\u003c\/strong\u003e scales output to match thermal load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR-454B Refrigerant\u003c\/strong\u003e — more efficient and eco-friendly than R-410A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e Intertek listed, UL Listed, ETL Listed, ENERGY STAR® certified, AHRI certified.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5-year parts and 7-year compressor coverage, eligible for the MRCOOL® Care Program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"callout\"\u003e\n\u003cstrong\u003eProposition 65 Warning:\u003c\/strong\u003e This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"MRCOOL","offers":[{"title":"Default Title","offer_id":53658036306285,"sku":"DIY4-B-55HP09091818","price":8425.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/6996\/6445\/files\/MRCOOL_DIY_5th_Gen_4-Zone_54_000_BTU_Ductless_Mini_Split_Air_Conditioner_Heat_Pump_9K_9K_18K_18K_DIY4-B-55HP09091818.png?v=1786191490","url":"https:\/\/ironlinetools.com\/products\/mrcool-diy-5th-gen-4-zone-54-000-btu-ductless-mini-split-air-conditioner-heat-pump-9k-9k-18k-18k-diy4-b-55hp09091818","provider":"Iron Line Tools","version":"1.0","type":"link"}