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MRCOOL DIY 18K Hyper Heat Mini Split System – 5th Gen, -22°F Heating, 21.2 SEER2, Pre-Charged DIY Line Set
Regular Price
$3,205.00
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New for 2025 – True -22°F Hyper Heat Performance with DIY Installation
The MRCOOL® DIYHH-18 Hyper Heat 18K Mini Split is the first 5th Generation DIY system engineered for true cold-climate installs down to -22°F. This complete bundle includes the DIYHH-18 outdoor condenser and the DIY-18-HP-WMAH-230D25-O wall-mounted air handler, delivering powerful heating and cooling for spaces up to 800 sq. ft.
Unlike traditional mini split systems, the MRCOOL DIY series uses factory-sealed QuickConnect® pre-charged line sets filled with R-454B low-GWP refrigerant, requiring no vacuum pump, gauges, nitrogen, or HVAC certification. This system installs quickly, safely, and cleanly—designed specifically for homeowners.
What's Included
- DIYHH-18-HP-C-230D25-O — 18K Hyper Heat Outdoor Condenser
- DIY-18-HP-WMAH-230D25-O — 18K Wall-Mounted Air Handler
- DIY25-1412 — 25 ft Pre-Charged QuickConnect® Line Set
- DIYPRO® Cable
- Wireless Remote + Manuals + Mounting Hardware
ℹ️ Line Set Length Info
This system includes a standard 25 ft. line set. Extended line set options add an additional line set, couplers, and a longer control wire for installations requiring extra distance.
Condenser Specifications – DIYHH-18-HP-C-230D25-O
| Performance | |
|---|---|
| BTU Rating | 18,000 BTU Heating & Cooling |
| SEER2 | 21.2 |
| EER2 | 12.5 |
| HSPF2-4 | 11 |
| HSPF2-5 | 8.5 |
| Min Ambient Heat | -22°F |
| Operating Temp Range | -22°F to 122F |
| Compressor | Inverter Rotary |
| CFM | 1765.8 |
| Electrical | |
| Voltage | 208/230V |
| Phase | 1 |
| Cycle | 60Hz |
| Min Circuit Ampacity | 19A |
| Max Fuse | 25A |
| Refrigeration | |
| Refrigerant | R-454B |
| Factory Charge Volume | 52.21 oz |
| Line Set | 25 ft Pre-Charged QuickConnect® |
| Max Supported Line Length | 75 ft |
| Liquid Line | 1/4 in |
| Suction Line | 1/2 in |
| Metering Device | Electronic Expansion Valve (EEV) |
| Noise | |
| Condenser Noise | 58 dBA |
| Dimensions | |
| Net Dimensions | 35.04” W × 26.5” H × 13.46” D |
| Net Weight | 99.87 lbs |
| Gross Dimensions | 40.55” W × 29.53” H × 18.11” D |
| Gross Weight | 120.15 lbs |
Wall Mount Air Handler – DIY-18-HP-WMAH-230D25-O
| Performance | |
|---|---|
| BTU Capacity | 18,000 BTU |
| Coverage Area | Up to 800 sq. ft. |
| Fan Speeds | 5-Speed |
| Quiet Mode | Yes |
| Noise Level | 19 dBA (Low) – 54.5 dBA (High) |
| Dimensions | |
| Net Dimensions | 42.52” W × 13.19” H × 8.9” D |
| Net Weight | 35.49 lbs |
| Gross Dimensions | 46.73” W × 14.29” H × 17.68” D |
| Gross Weight | 49.6 lbs |
Smart Features
- MRCOOL SmartHVAC App
- iOS + Android Compatible
- Alexa & Google Assistant Voice Control
- Wireless Remote Included
Warranty
- 7-Year Compressor Warranty (Registered)
- 5-Year Parts Warranty (Registered)
- Extended Limited Lifetime with MRCOOL Care
FAQs About Our HVAC Products
Ordering & Compatibility
1. Do you sell HVAC equipment to homeowners and DIY installers?
Yes. Freedom HVAC Supply sells HVAC equipment and parts to contractors, property owners, and qualified DIY installers. Some products may require professional installation based on local codes.
2. How do I know if this HVAC product is compatible with my system?
Product pages include specifications and compatibility details. If you’re unsure, our team can help verify fit before you order.
3. Can HVAC contractors purchase from Freedom HVAC Supply?
Absolutely. We work with licensed HVAC contractors, installers, and professionals nationwide.
Installation & Support
1. Do HVAC systems require professional installation?
Some HVAC equipment must be installed by a licensed professional to meet code requirements or warranty terms. Always review manufacturer guidelines.
2. Can you help me choose the right HVAC system or part?
Yes. Our support team can assist with product selection based on your application, space, and installation needs.
3. Do you provide installation manuals or documentation?
Manufacturer installation guides and documentation are included or available upon request for most products.
Warranty & Shipping
1. Do HVAC products include a manufacturer warranty?
Most HVAC equipment includes a manufacturer warranty when installed according to guidelines. Warranty terms vary by brand and product.
2. Do you ship HVAC equipment nationwide?
Yes. We ship HVAC systems and parts throughout the continental United States using trusted freight and parcel carriers.
3. What should I know about freight delivery for HVAC equipment?
Larger HVAC equipment ships via freight and should be inspected upon delivery. Delivery details are provided during checkout.
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