A Moment to Browse｜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 HVAC615-553-8118
Family owned & USAs #1 MRCOOL® Authentication Dealer.
When you buy here, you buy from MRCOOL DIRECT—the name homeowners trust.
 
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