MRCOOL® 55K 6-Zone DIY® Mini Split System w/ 18k + 24k Air Handlers- two 25ft Pre- Charged Line Sets- DIYM255HPW03D07

Product Description 

Model: DIYM255HPW03D07

The MRCOOL® DIYM255HPW03D07 is a high-output 55,000 BTU 6-zone DIY® mini split system engineered for whole-home comfort, flexible zoning, and long-term energy savings—without the cost of professional HVAC installation. Built around the powerful MRCOOL® DIY® 5th Generation double-stack 6-zone condenser, this system delivers precise heating and cooling across multiple spaces using advanced inverter technology and environmentally improved R-454B refrigerant.

This configuration pairs an 18,000 BTU wall-mounted air handler—ideal for bedrooms, offices, or living spaces—with a 24,000 BTU wall-mounted air handler designed for large open areas, garages, or bonus rooms. Installation is simplified using DIY® QuickConnect® pre-charged line sets, which arrive factory-sealed and eliminate the need for vacuum pumps, gauges, or refrigerant handling. The included DIYPRO® cable replaces traditional conduit, protecting communications wiring from weather, UV exposure, and pests.

Once installed, full system control is available through the MRCOOL® Smart HVAC Controller®, allowing you to manage each zone independently from your smartphone. Adjust temperatures, create schedules, monitor energy usage, or operate hands-free using Amazon Alexa or Google Assistant. Comfort-enhancing features like Follow Me® temperature sensing, Gold Fin® corrosion-resistant coils, and ultra-quiet operation make this system a smart, long-term investment for homeowners who want control, efficiency, and reliability.

This is a true DIY® multi-zone heat pump system designed to outperform traditional HVAC setups while giving you complete control over your home’s comfort.

 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-24-HP-WMAH-230D25-O
  24,000 BTU Wall-Mounted Air Handler (up to ~1,050 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
• Zone Capacity: Up to 6 zones
• 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 are factory-charged, eliminating vacuuming and refrigerant handling.

Q: Can I expand this system later?

Yes. This condenser supports up to six total zones, allowing future indoor unit additions.

Q: Does this system work with smart home devices?

Yes. It integrates 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?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL systems from a trusted dealer

When you buy from MRCOOL Direct, you’re buying from specialists—not resellers.

BUY DIRECT!

Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118

Family owned & USAs #1 MRCOOL Authentication Dealer.