MRCOOL® DIY® 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (6K + 6K + 36K) Ductless Mini-Split Air Conditioner & Heat Pump — DIYM355HPW00D37

Product Description 
Model: DIYM355HPW00D37
  
The MRCOOL DIY® 5th Generation 55,000 BTU 6-Zone Multi-Zone Mini-Split System is engineered for homeowners who demand whole-home comfort, room-by-room control, and long-term efficiency—without paying thousands in professional installation costs. This system is designed around MRCOOL’s industry-leading DIY® QuickConnect® technology, allowing true DIY installation while delivering contractor-grade performance.
Unlike generic multi-zone systems, this configuration combines two 6K zones for small rooms with a powerful 36K air handler for large open areas, giving you intelligent zoning that actually matches how real homes are laid out. When paired with the 55K 6-Zone inverter condenser, this bundle delivers consistent comfort, reduced energy waste, and precise temperature control across the entire home.
 
SYSTEM OVERVIEW 
At the heart of this system is the MRCOOL DIY® 55,000 BTU 6-Zone condenser, powered by advanced inverter technology and charged with next-generation R-454B refrigerant. This allows the system to automatically modulate output based on demand, reducing cycling, lowering electrical consumption, and extending system life.
Each indoor unit communicates through the included DIYPRO® cable, eliminating the need for conduit and simplifying installation. Comfort features like Follow Me® temperature sensing, Gold Fin® corrosion protection, and full MRCOOL® Smart HVAC Controller® app integration elevate this system well beyond basic mini-splits.
 
 
KEY FEATURES & PERFORMANCE HIGHLIGHTS

True DIY® Installation — MRCOOL’s patented DIY® QuickConnect® line sets come factory-charged with R-454B refrigerant, eliminating vacuum pumps, gauges, and HVAC licensing.
22 SEER2 High-Efficiency Performance — Advanced inverter technology automatically adjusts output to reduce energy consumption while maintaining consistent comfort.
6-Zone Comfort Control — Independently control temperatures in up to six rooms, eliminating hot spots and wasted energy.
Next-Generation R-454B Refrigerant — Lower global warming potential than R-410A and fully future-compliant.
Gold Fin® Corrosion Protection — Protects outdoor and indoor coils from coastal air, humidity, and corrosion.
Follow Me® Temperature Sensing — The remote senses temperature where you are, not where the unit is mounted.
DIYPRO® Cable Included — Eliminates conduit requirements and adds durability against weather and pests.
Smart HVAC Control Built In — Control each zone from anywhere using the MRCOOL® Smart HVAC Controller® App, Amazon Alexa®, or Google Home®.

 
 EFFICIENCY, WARRANTY & LONG-TERM VALUE
This MRCOOL DIY® multi-zone system is engineered not only for comfort, but for long-term ownership savings.

SEER2 Rating: 22
HSPF2-4: 10.6
Inverter-Driven Compressor: Yes
ENERGY STAR® Certified: Yes

 
INDUSTRY-LEADING WARRANTY
When installed according to manufacturer guidelines:

5-Year Parts Warranty
7-Year Compressor Warranty

Eligible for the MRCOOL® Care Kit Program 

This warranty structure is one of the strongest in the DIY HVAC industry, giving homeowners peace of mind well beyond the initial install.
WHY THIS CONFIGURATION WORKS SO WELL
This bundle is strategically designed for real-world home layouts:

6K zones → bedrooms, offices, nurseries
36K zone → living rooms, basements, open-concept spaces
Independent zone control = no wasted energy
Balanced load across the condenser = longer system life

Instead of oversizing or underperforming, this layout delivers efficient, targeted comfort exactly where it’s needed.
 
WHO THIS SYSTEM IS BEST FOR

Large homes with mixed room sizes
Open-concept living areas + private bedrooms
Homeowners replacing expensive central HVAC
DIYers who want maximum value and control
Customers wanting future-proof refrigerant (R-454B)

 
 WHAT’S INCLUDED IN THIS COMPLETE DIY BUNDLE
(Smart phone not included)

(1) MRCOOL DIY® 5th Gen 55,000 BTU 6-Zone Multi-Zone Condenser DIY-MULTI6-55HP230D-O

(2) MRCOOL DIY® 6,000 BTU Wall-Mount Air Handlers DIY-06-HP-WMAH-230D25-O

(1) MRCOOL DIY® 36,000 BTU Wall-Mount Air Handler DIY-36-HP-WMAH-230D25-O

(2) MRCOOL DIY® 25 ft 1/4 × 3/8 QuickConnect® Line Sets DIY25-1438-O

(1) MRCOOL DIY® 25 ft 3/8 × 5/8 QuickConnect® Line Set DIY25-3858-O

DIYPRO® cable included with indoor units
Wireless remotes for each zone

 
 ELECTRICAL & INSTALLATION NOTES

Voltage: 208/230V
Phase: Single-phase
Max breaker (condenser): 45A
Min circuit ampacity: 43A
No vacuuming or refrigerant handling required
No HVAC license needed for installation

 
 
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.
 
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