MRCOOL® 55K 6-Zone DIY® Mini Split System w/ 18k + 36k Air Handlers- two 25ft Pre- Charged Line Sets- DIYM255HPW04D07

Product Description 
Model: DIYM255HPW04D07
 
The MRCOOL® DIYM255HPW04D07 is a high-capacity 55,000 BTU 6-zone DIY® mini split system engineered for homeowners who demand professional-grade comfort, flexible zoning, and long-term energy savings—without paying contractor installation costs. Built around the MRCOOL® DIY® 5th Generation double-stack 6-zone condenser, this system delivers powerful, inverter-driven performance using next-generation R-454B refrigerant for improved efficiency and environmental compliance.
This configuration is ideal for homes that need balanced zone control, pairing an 18,000 BTU wall-mounted air handler for bedrooms, offices, or medium living spaces with a 36,000 BTU wall-mounted air handler designed for large open areas such as great rooms, basements, workshops, or garages. Installation is simplified with DIY® QuickConnect® pre-charged line sets, eliminating vacuum pumps, gauges, and refrigerant handling altogether. The included DIYPRO® cable removes the need for electrical conduit while protecting system communications from UV exposure, moisture, and pests.
Once installed, the system integrates seamlessly with the MRCOOL® Smart HVAC Controller®, allowing you to control each zone independently from your smartphone. Set schedules, fine-tune temperatures, monitor energy usage, or operate the system hands-free using Amazon Alexa or Google Assistant. Comfort-enhancing features such as Follow Me® temperature sensing, Gold Fin® corrosion-resistant coils, and quiet inverter operation make this system a premium, long-term HVAC solution designed for real-world performance.
This is a true DIY® multi-zone heat pump system built to scale with your home, reduce operating costs, and deliver contractor-level results—installed on your terms.
 
 
 WHAT’S INCLUDED IN THIS BUNDLE

✔ MRCOOL® DIY-MULTI6-55HP230D-O 55,000 BTU 6-Zone 5th Gen DIY® Multi-Zone Double-Stack Condenser (230V)

✔ MRCOOL® DIY-18-HP-WMAH-230D25-O 18,000 BTU Wall-Mounted Air Handler (up to ~800 sq ft)

✔ MRCOOL® DIY-36-HP-WMAH-230D25-O 36,000 BTU Wall-Mounted Air Handler (up to ~1,550 sq ft)

✔ MRCOOL® DIY25-1412-O 25 ft DIY® QuickConnect® Line Set (1/4” x 1/2”)

✔ MRCOOL® DIY25-3858-O 25 ft DIY® QuickConnect® Line Set (3/8” x 5/8”)

✔ DIYPRO® communication cable
✔ Wireless remotes for each indoor unit
✔ Wall mounting hardware & installation accessories

Smart phone not included
 
 
⚙️ KEY SYSTEM SPECS & ELECTRICAL REQUIREMENTS

Total System Capacity: 55,000 BTU
Maximum Zones Supported: 6
SEER2: 22
HSPF2-4: 10.6
Refrigerant: R-454B
Voltage: 208/230V (Single Phase)

Max Breaker (Condenser): 45A

Minimum Circuit Ampacity: 43A

Inverter-Driven Compressor: Yes
ENERGY STAR® Certified: Yes
AHRI Certified: Yes

 
 
 FREQUENTLY ASKED QUESTIONS 
Q: Is this system really DIY® installable?
Yes. DIY® QuickConnect® line sets come factory-charged, so no vacuuming or refrigerant work is required.
 
Q: Can I add more indoor units later?
Yes. The condenser supports up to six total zones, allowing future expansion.
 
Q: Does it work with smart home systems?
Yes. Fully compatible with the MRCOOL® Smart HVAC Controller®, Amazon Alexa, and Google Assistant.
 
Q: What warranty coverage is included?

5-Year Parts Warranty
7-Year Compressor Warranty
Eligible for the MRCOOL® Care kit program 

  
 WHY BUY FROM MRCOOL DIRECT

✔ Authorized MRCOOL® dealer
✔ Factory-fresh equipment with full manufacturer warranty
✔ Fast nationwide shipping
✔ Expert DIY® system support
✔ Trusted source for advanced multi-zone solutions

 
When you buy from MRCOOL Direct, you’re buying from specialists who live and breathe DIY® HVAC systems.
  
BUY DIRECT!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC615-553-8118
Family owned & USAs #1 MRCOOL Authentication Dealer.
 
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