HOT ! MRCOOL DIY 5th Gen Multi-Zone 6‑Zone 55,000 BTU 22 SEER2 (6K + 9K + 36K) Ductless Mini‑Split Air Conditioner & Heat Pump System DIYM355HPW02D37

MRCOOL DIY 5th Gen Multi-Zone 6‑Zone 55,000 BTU 22 SEER2 (6K + 9K + 36K) Ductless Mini‑Split Air Conditioner & Heat Pump System DIYM355HPW02D37

The MRCOOL DIY 5th Gen Multi‑Zone 6‑Zone 55,000 BTU Mini‑Split System (Model DIYM355HPW02D37) delivers exceptional comfort and efficiency for large homes, workshops, and mixed‑use spaces — all with true DIY installation. Featuring a high‑capacity outdoor condenser paired with three indoor air handlers (6K, 9K, and 36K BTU), this system offers flexible temperature control tailored to each room’s needs. Designed around MRCOOL’s patented QuickConnect® technology, the pre‑charged line sets and included DIYPRO® cable eliminate the need for vacuum pumps, refrigerant charging, or professional HVAC labor, making setup fast and accessible to confident DIYers.

Equipped with advanced DC inverter technology and eco‑friendly R‑454B refrigerant, this system achieves up to 22 SEER2 efficiency and maintains whisper‑quiet operation throughout the year. With smart capabilities — including compatibility with the MRCOOL Smart HVAC Controller® app and voice assistants like Alexa and Google Home — users gain intuitive control from anywhere. Independent zone control ensures every area in your space stays comfortable without energy waste.

Features

• 55,000 BTU total system capacity


• Supports up to 6 indoor zones


• 22 SEER2 efficiency / 10.6 HSPF2-4


• DC inverter compressor for load-based output


• DIY® QuickConnect® pre-charged line sets


• Extended-length 25-ft line sets included


• DIYPRO® cable (no electrical conduit required)


• Gold Fin® corrosion-resistant coating


• Follow Me® temperature sensing


• MRCOOL® Smart HVAC Controller® App


• Alexa® & Google Home® compatible


• Ultra-quiet indoor operation


• Independent temperature control by zone

Specifications

What’s Included 

• ✔ MRCOOL® DIY® 55K BTU 6-Zone Outdoor Condenser


• ✔ 6K BTU Wall-Mounted Indoor Air Handler


• ✔ 9K BTU Wall-Mounted Indoor Air Handler


• ✔ 36K BTU Wall-Mounted Indoor Air Handler


• ✔ (2) 25-ft DIY® QuickConnect® Line Sets (1/4 × 3/8)


• ✔ (1) 25-ft DIY® QuickConnect® Line Set (3/8 × 5/8)


• ✔ DIYPRO® communication cable


• ✔ Wireless remotes for each indoor unit


• ✔ Installation manuals & mounting hardware

Frequently Asked Questions (FAQ\'s)

Is this a true DIY system?

Yes. No vacuum pump, gauges, or refrigerant handling required.

Can I add more indoor units later?

Yes. This condenser supports up to six total zones.

Does it heat in cold weather?

Yes. The inverter heat pump provides reliable low-temperature heating.

Is this system certified?

Yes. ENERGY STAR® and AHRI certified.