MRCOOL® DIY® 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (9K + 9K + 36K) 3 x 25ft line sets- Ductless Mini-Split Air Conditioner & Heat Pump — DIYM355HPW09D37

Product Description 

Model: DIYM355HPW09D37

 

The MRCOOL® DIYM355HPW09D37 is a high-performance, large-capacity 5th Generation DIY® multi-zone system designed for homeowners who need serious cooling and heating power across multiple rooms and large open areas—without paying professional installation costs.

This bundle is built around the MRCOOL® DIY® 55,000 BTU 6-Zone condenser and pairs two 9K BTU air handlers for bedrooms, offices, or smaller living spaces with a massive 36K BTU wall-mounted unit for great rooms, basements, workshops, or open-concept main floors. The result is balanced zoning, independent comfort control, and maximum efficiency where it matters most.

Thanks to DIY® QuickConnect® pre-charged line sets, DIYPRO® cable, and MRCOOL’s no-vacuum installation design, homeowners can install this system themselves—saving thousands while still getting contractor-grade performance. With R-454B refrigerant, DC inverter technology, and full smart app control, this system is built to deliver quiet, efficient, year-round comfort for large homes and demanding layouts.

 

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 precise load control
• DIY® QuickConnect® pre-charged line sets
• Extended-reach 25-ft line sets included
• DIYPRO® cable — no conduit required
• Gold Fin® corrosion-resistant coating
• Follow Me® temperature sensing
• MRCOOL® Smart HVAC Controller® App
• Amazon 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

9K Indoor Air Handler (each)

• 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
• ✔ (2) 9K BTU Wall-Mounted Indoor Air Handlers
• ✔ (1) 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 system truly DIY?

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

 

Can I add more zones later?

Yes. This condenser supports up to six indoor units total.

 

Will it heat efficiently in winter?

Yes. The inverter heat pump delivers strong low-temperature heating performance.

 

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.

When you buy here, you buy from MRCOOL DIRECT—the name homeowners trust.