MRCOOL® 55K 5th Gen 6-Zone DIY® Mini Split System with (6K + 36K) Air Handlers & (16ft + 16ft) Pre- Charged R-454B Line Sets, (230V)-DIYM255HPW00D00

Product Description 
Model: DIYM255HPW00D00
The MRCOOL® DIYM255HPW00D00 is a top-of-the-line 55,000 BTU multi-zone DIY® mini split system designed for homeowners who want maximum coverage, precision comfort, and true do-it-yourself installation—without paying contractor labor.
This bundle pairs MRCOOL’s most powerful 5th Generation DIY® 6-zone condenser with a dual-zone indoor configuration: a 6K air handler for small, precision spaces and a 36K air handler built to handle large open areas like living rooms, basements, workshops, or additions. Together, they create a flexible, scalable comfort solution capable of heating and cooling up to 1,750 square feet.
Thanks to DIY® QuickConnect® technology, factory-sealed R-454B refrigerant, and integrated DIYPRO® cable, installation is dramatically simplified—no vacuum pump, no gauges, no brazing, and no licensed HVAC technician required. Once installed, you gain full control through the MRCOOL® Smart HVAC Controller®, mobile app, or hands-free voice control using Amazon Alexa or Google Home.
Built for longevity, efficiency, and real-world DIY success, this system is engineered to outperform traditional systems while keeping long-term energy costs low.
 
 
55K MRCOOL® DIY® 6-ZONE CONDENSER
Model: DIY-MULTI6-55HP230D-O
This 55,000 BTU outdoor condenser is MRCOOL’s most powerful DIY® multi-zone platform, capable of independently managing up to six indoor zones with precision inverter control.

Key Performance Highlights

Up to 6 zones
Covers up to 2,290 sq. ft.
22 SEER2 / 10.6 HSPF2-4
Advanced DC inverter compressor
R-454B refrigerant (lower GWP, higher efficiency)
Gold Fin® corrosion-resistant coil
ENERGY STAR® & AHRI Certified

 
 
Electrical Requirements

Minimum Circuit Ampacity: 43A
Maximum Fuse / Breaker: 45A

  
6K DIY® WALL-MOUNT AIR HANDLER
Model: DIY-06-HP-WMAH-230D25-O
 
Perfect for bedrooms, offices, nurseries, or small bonus rooms, this 6K unit delivers quiet, efficient comfort where precision matters.

Covers up to 200 sq. ft.
Ultra-quiet operation
Follow Me® temperature sensing
Dry Mode for humidity control
App, remote, and voice control
Gold Fin® corrosion protection

 
36K DIY® WALL-MOUNT AIR HANDLER
Model: DIY-36-HP-WMAH-230D25-O
Designed for large open spaces, the 36K air handler brings serious heating and cooling power with refined efficiency.

Covers up to 1,550 sq. ft.
High-output airflow
Follow Me® comfort tracking
Multi-speed fan + quiet mode
SmartHVAC app compatibility
Gold Fin® coated for durability

 
 
DIY® QUICKCONNECT® LINE SETS (INCLUDED)
 (1) 16-FT 1/4” × 3/8” Line Set
Model: DIY16-1438-O
For the 6K air handler
(1) 16-FT 3/8” × 5/8” Line Set
Model: DIY16-3858-O
For the 36K air handler
Both arrive pre-charged with R-454B, factory-sealed, and ready to connect—no special tools required.
 
WHAT’S INCLUDED — DIYM255HPW00D00
Outdoor Unit

(1) MRCOOL® DIY® 55K 6-Zone Condenser DIY-MULTI6-55HP230D-O

 
Indoor Units

(1) MRCOOL® 6K Wall-Mount Air Handler
(1) MRCOOL® 36K Wall-Mount Air Handler

 
Line Sets

(1) 16-ft DIY® QuickConnect® Line Set (1/4 × 3/8)
(1) 16-ft DIY® QuickConnect® Line Set (3/8 × 5/8

Accessories

Wireless remotes
Mounting hardware
MRCOOL® Smart HVAC Controller®
Installation manuals

Smartphone not included.
 
 
FAQ — Frequently Asked Questions 
Can I add more indoor units later?
Yes. The condenser supports up to 6 zones if additional air handlers are added.
 
Is this truly DIY?
Yes. DIY® QuickConnect® eliminates refrigerant handling and specialty HVAC tools.
 
Is this system efficient?
Extremely. R-454B refrigerant and inverter technology reduce energy usage year-round.
 
Does it support smart home control?
Yes. Works with the MRCOOL® Smart HVAC Controller®, Alexa, and Google Home.
  
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 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.
 
Brand:MRCOOL®Category:2 Zones/RoomsSKU:DIYM255HPW00D00Tags:55K Mini Split, 6 Zone Mini Split, 6K + 36K, DIY, DIY 5th Gen, DIY Multi Zone, DIY QuickConnect, DIY Series, DIYM255HPW00D00, DIYPRO cable, Follow Me, Gold Fin, MRCOOL, MRCOOL Direct, MRCOOL DIY, MULTI ZONE, Pre-Charged R-454B, R-454B, R-454B refrigerant, R454B, Smart HVAC