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MRCOOL 18,000 BTU DIY HYPER HEAT 21.2 SEER Ductless Mini Split AC Split

USD $3,523.00

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MRCOOL DIY® 5th Gen Hyper Heat 18,000 BTUThe MRCOOL DIY® 5th Generation Hyper Heat Mini-Split is a do-it-yourself-friendly, high-efficiency heating and cooling system that delivers both comfort and convenience. Thanks to the patented Quick-Connect® pre-charged R-454B line set and included DIYPRO® cable, the complete system (indoor air handler, outdoor condenser, line set, and controls) can be installed by a homeowner — no refrigerant refill, vacuum pump, or HVAC license needed. Certified for safety and performance by an independent lab, this unit delivers reliable cooling and heating with inverter technology, whisper-quiet operation, smart controls (remote, app, timer, auto-restart), and Hyper Heat performance for year-round comfort. Whether you’re outfitting a small room or a larger living space, the 5th Gen adapts to your needs and brings efficient, flexible climate control with minimal installation hassle.

  • True DIY installation with MRCOOL’s patented Quick-Connect® line set; no vacuum pump or HVAC technician required.

  • Pre-charged with R-454B refrigerant, offering cleaner and more efficient operation.

  • Hyper Heat performance provides reliable heating in temperatures as low as –22°F and cooling up to 122°F.

  • Quick-Connect fittings and line sets are pressure-tested and certified by Intertek for safety and durability.

  • Smart comfort features include remote control, optional app control, auto-restart, sleep mode, and programmable timers.

  • Energy-saving DC inverter technology delivers high efficiency and reduces temperature fluctuations.

  • Complete system includes indoor air handler, outdoor condenser, pre-charged line set, communication cable, wall sleeve, and installation accessories.

    * 5 years warranty on parts and 7 years warranty on the compressor *



Model Numbers
Outdoor: DIYHH-18-HP-C-230D25-O
Indoor: DIY-18-HP-WMAH-230D25-O

Performance
• Cooling Capacity: 18,000 BTU
• Heating Capacity: 18,000 BTU
• SEER2: 21.2
• EER2: 12.5
• HSPF2-4: 11.0
• HSPF2-5: 8.5
• Coverage: Up to 800 sq ft
• Operating Range: -22°F to 122°F

Noise Levels
• Indoor: 54.5 / 45 / 40 / 30.5 / 20.5 dB
• Outdoor: 58 dB

Electrical Requirements
• Power: 208/230V, 60Hz, 1Ph
• Min Circuit Ampacity: 19A
• Max Fuse: 25A

Refrigerant & Line Set
• Refrigerant: R-454B
• Charge: 52.21 oz
• Line Set: 1/4" Liquid / 1/2" Gas

Dimensions & Weight
Indoor Unit: 42.52" x 8.90" x 13.19" – 35.49 lb
Outdoor Unit: 35.04" x 13.46" x 26.50" – 99.87 lb



MRCOOL 18,000 BTU DIY HYPER HEAT 21.2 SEER Ductless Mini Split AC Split
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