MRCOOL® DIY® 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (6K + 9K + 36K) + 3- 25ft line sets- Ductless Mini-Split Air Conditioner & Heat Pump — DIYM355HPW02D37

Product Description 

Model: DIYM355HPW02D37

The MRCOOL® DIYM355HPW02D37 is a high-output, large-space 5th Generation DIY® multi-zone system engineered for homeowners who need maximum coverage, high efficiency, and total installation freedom without paying HVAC labor costs. Built around the powerful MRCOOL® DIY® 55,000 BTU 6-Zone outdoor condenser, this system is ideal for large homes, workshops, garages, additions, and mixed-size living spaces.

This configuration combines three indoor air handlers (6K, 9K, and a high-capacity 36K BTU unit)—perfect for pairing smaller bedrooms or offices with expansive open-concept areas. The included 25-foot DIY® QuickConnect® line sets allow extended reach while maintaining MRCOOL’s patented pre-charged, vacuum-free installation process.

Powered by DC inverter technology, eco-friendly R-454B refrigerant, and controlled through the MRCOOL® Smart HVAC Controller®, this system delivers quiet, precise comfort with exceptional energy savings year-round.

 KEY FEATURES & PERFORMANCE HIGHLIGHTS

• 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

ELECTRICAL REQUIREMENTS & BREAKER INFO

Outdoor Condenser – DIY-MULTI6-55HP230D-O

• Voltage: 208 / 230V
• Phase: Single-phase
• Frequency: 60 Hz
• Minimum Circuit Ampacity (MCA): 43 amps
• Maximum Breaker Size: 45 amps
• Dedicated Circuit Required: Yes

DIMENSIONS & WEIGHT

Outdoor Condenser

• Width: 37.48 in
• Height: 52.48 in
• Depth: 16.34 in
• Weight: 245.8 lbs

6K Indoor Air Handler

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Weight: 24.5 lbs

9K Indoor Air Handler

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Weight: ~25 lbs

36K Indoor Air Handler

• Width: 49.57 in
• Height: 14.25 in
• Depth: 11.10 in
• Weight: ~49 lbs

 WARRANTY COVERAGE

• 5-Year Parts Warranty
• 7-Year Compressor Warranty
• Eligible for the MRCOOL® Care Kit Program

 WHAT’S INCLUDED IN THIS BUNDLE 

• ✔ 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

Smart phone not included.

FREQUENTLY ASKED QUESTIONS 

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.

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 MRCOOL® dealer.

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.