MRCOOL 55K 6-Zone DIY Mini Split System w/ 12k + 36K Air Handlers DIYM255HPW02D07

MRCOOL 55K 6-Zone DIY Mini Split System w/ 12k + 36K Air Handlers DIYM255HPW02D07 

The MRCOOL 55K 6-Zone DIY Mini Split System w/ 12k + 36K Air Handlers DIYM255HPW02D07 is engineered to deliver powerful year-round heating and cooling to large homes, workshops, garage spaces, and multi-room layouts—all with true DIY installation convenience. Built around a robust 55,000 BTU 5th-Generation multi-zone condenser, this system pairs a 12,000 BTU air handler for smaller zones like bedrooms or offices with a 36,000 BTU air handler designed for larger living spaces, open areas, or common rooms. Enjoy tailored comfort in up to six independently controlled zones without the need for professional HVAC labor.

Thanks to MRCOOL’s innovative DIY® QuickConnect® pre-charged line sets, installation is simplified: no vacuum pumps, refrigerant gauges, or special tools are needed. A rugged DIYPRO® communication cable eliminates the need for conduit while safeguarding wiring against weather and pests. Once installed, this mini-split integrates seamlessly with the MRCOOL Smart HVAC Controller, allowing control from your phone as well as compatibility with Amazon Alexa and Google Assistant.

Beyond intuitive installation and smart controls, this system is built with reliability and performance in mind. Advanced inverter technology paired with next-generation R-454B refrigerant ensures efficient operation that keeps energy costs down. Features like Follow Me® temperature sensing and Gold Fin® corrosion protection enhance comfort precision and long-term durability, making this unit a sound investment in year-round home climate control.

Every component arrives ready to install with wireless remotes, wall mounting hardware, and comprehensive instructions included—so you can start gaining comfort and control right away. With industry-leading performance and DIY simplicity, this MRCOOL system stands out as a versatile solution for multi-room comfort.

Features

• 55,000 BTU 6-Zone 5th Gen DIY® Double-Stack Condenser
• 12,000 BTU Wall-Mounted Air Handler
• 36,000 BTU Wall-Mounted Air Handler
• (2) 25 ft DIY® QuickConnect® Line Sets (1/4” x 3/8” & 3/8” x 5/8”)
• DIYPRO® Communication Cable
• Wireless Remotes (for each indoor unit)
• Wall Mounting Hardware & Installation Accessories
• Smart HVAC Controller Compatibility (Phone, Alexa, Google Assistant) 

Performance & Convenience
• True DIY installation with pre-charged QuickConnect® line sets (no refrigerant handling)
• Zoned comfort with independent control per indoor unit
• Smart thermostatic control via app or voice assistant
• Follow Me® temperature sensing for precise comfort
• Gold Fin® anti-corrosion protection for outdoor durability
• Industry-leading warranties for added peace of mind

Specifications

  What’s Included 

• ✔ MRCOOL® DIY-MULTI6-55HP230D-O
  55,000 BTU 6-Zone 5th Gen DIY® Multi-Zone Double-Stack Condenser (230V)
• ✔ MRCOOL® DIY-12-HP-WMAH-230D25-O
  12,000 BTU Wall-Mounted Air Handler (up to ~550 sq ft)
• ✔ MRCOOL® DIY-36-HP-WMAH-230D25-O
  36,000 BTU Wall-Mounted Air Handler (up to ~1,550 sq ft)
• ✔ MRCOOL® DIY25-1438-O
  25 ft DIY® QuickConnect® Line Set (1/4” x 3/8”)
• ✔ 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

Frequently Asked Questions (FAQ's)

Q: Is this system really DIY® friendly?

Yes. The DIY® QuickConnect® line sets come factory-charged, eliminating vacuuming and refrigerant work.

Q: Can I add more indoor units later?

Yes. The condenser supports up to six zones total, allowing future expansion.

Q: Does this system work with smart home platforms?

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
• Limited Lifetime Replacement Warranty with MRCOOL® Care enrollment