MRCOOL® 27k 5th Gen 4-Zone DIY® Multi-Zone Bundle (12k + 12k) Air Handlers, (25ft + 25ft) Pre Charged R-454B Line Sets, 230V) — DIYM227HPW04D06

Product Description 
Model: DIYM227HPW04D06
 
Short Description
The MRCOOL DIYM227HPW04D06 bundle pairs the 27k 4-Zone DIY-MULTI4-27HP230D-O condenser with two 12k DIY 5th Gen wall-mount air handlers and two 25 ft pre-charged QuickConnect® R-454B line sets. It’s a plug-and-play style multi-zone mini split solution for two rooms up to ~550 sq. ft. each, with expansion room for up to 4 indoor units total. True DIY installation, high efficiency, and smart control—backed by MRCOOL’s industry-leading DIY warranty and sold by the USA’s #1 most trusted MRCOOL dealer.
Long Product Description 

 
Overview: 27k Multi-Zone DIY Bundle with (2) 12k Zones
The MRCOOL® DIYM227HPW04D06 bundle is a factory-matched two-zone DIY system built on the powerful DIY-MULTI4-27HP230D-O 27k BTU 4-zone condenser and two 12k DIY wall-mounted air handlers (DIY-12-HP-WMAH-230D25-O).
It’s ideal if you need to heat and cool two medium-sized rooms up to ~550 sq. ft. each, with the ability to add up to two more indoor units later as your home or project grows.
 
This bundle includes:

DIY-MULTI4-27HP230D-O – 27k BTU, 4-Zone Multi-Zone DIY Outdoor Condenser (230V, R-454B)
(2) DIY-12-HP-WMAH-230D25-O – 12k BTU 5th Gen DIY Wall-Mount Air Handlers (up to ~550 sq. ft. each)
(2) DIY25-1438-O – 25 ft Pre-Charged QuickConnect® R-454B Line Sets (1/4” x 3/8”)

 
With up to 23 SEER2 and 9.5 HSPF2-4, this 5th Gen R-454B system delivers strong efficiency, quiet operation, and smart home integration—all without hiring an HVAC contractor.

True DIY Install with Pre-Charged Line Sets
Like the other MRCOOL® DIY bundles, DIYM227HPW04D06 is built around real homeowner installation:

Pre-charged QuickConnect® line sets – (2) DIY25-1438-O line sets arrive pre-filled with R-454B and sealed from the factory.
No vacuum pump, no gauges, and no refrigerant handling. Just connect the fittings per the MRCOOL install manual.
DIYPRO® cable (with applicable DIY components) eliminates traditional conduit and protects wiring from weather, pets, and yardwork.

 
If you’re comfortable drilling, mounting wall brackets, and following instructions, this system is designed for you.

Two Balanced 12k Zones for Real-World Rooms
Instead of oversizing one room and starving another, this bundle gives you two equal 12k zones, both using the DIY-12-HP-WMAH-230D25-O air handler:

Each 12k zone is rated for up to ~550 sq. ft. in typical conditions.
Great for bedrooms, offices, bonus rooms, small apartments, basements, shops, or living areas.
Because the condenser is a true 4-zone unit, you can later add additional MRCOOL® DIY air handlers (within BTU and port limits) to expand coverage.

 
Each zone has its own remote and full smart controls, so you can keep one office cool and one bedroom mild without fighting over a single thermostat.
Smart, Connected, and Quiet
Every 12k DIY wall-mount air handler in this DIYM227HPW04D06 kit comes loaded with smart features:

SmartHVAC® app for iOS and Android
Alexa & Google Assistant voice control
Follow Me® function on the remote tracks temperature where you actually are
Modes: Cool, Heat, Dry, Fan, Auto, Sleep, Quiet

 
The DIY-MULTI4-27HP230D-O outdoor unit uses a DC inverter compressor for smooth ramp-up and ramp-down, reducing noise and energy use compared to single-stage systems.

R-454B 5th Gen Efficiency & Future-Ready Design
This 5th Generation MRCOOL® DIY system uses R-454B, a low-GWP refrigerant that helps future-proof your HVAC investment:

High efficiency: 23 SEER2, 12 EER2, 9.5 HSPF2-4
Stable year-round heating and cooling for most climates
Supports up to 4 indoor units from a single outdoor condenser

 
Why Buy from the USA’s #1 Most Trusted MRCOOL Dealer
Ordering this kit from MRCOOL Direct – the USA’s #1 most trusted MRCOOL dealer gives you:

Factory-fresh 5th Gen R-454B components
Help verifying room sizes, layout, and electrical before you buy
Real humans who know MRCOOL DIY inside and out if you have install questions
A manufacturer-matched bundle under one listing: DIYM227HPW04D06

 
Not sure if two 12k zones is right for your layout?
Call us before you order and we’ll help size your rooms and compare bundles so you get the best MRCOOL DIY system for your project.

 
Key Specifications
System Type

Brand: MRCOOL®
Series: DIY 5th Gen Multi-Zone Mini-Splits
Bundle Model: DIYM227HPW04D06
Outdoor Condenser: DIY-MULTI4-27HP230D-O

Indoor Units:

(2) DIY-12-HP-WMAH-230D25-O – 12k BTU Wall-Mount Air Handlers

Refrigerant: R-454B

Performance

Total System Capacity: 27,000 BTU (2.25 tons)
Condenser Cooling Capacity: 26,000 BTU
Condenser Heating Capacity: 26,000 BTU

Efficiency Ratings:

SEER2: 23
EER2: 12
HSPF2-4: 9.5
HSPF2-5: 7

Zones Supported by Condenser: Up to 4 (2 used in this bundle)

 
Coverage

Each 12k Zone: up to ~550 sq. ft.
Typical Total Coverage (2 zones active): ~900–1,100 sq. ft., depending on layout, insulation, and climate.

 
Electrical

Voltage: 208/230V, 1-Phase, 60 Hz

Outdoor Condenser (DIY-MULTI4-27HP230D-O):

Max Fuse / Breaker: 25A
Minimum Circuit Ampacity (MCA): 23A

Indoor Units: 12k wall-mounts powered via condenser (control/power cable; follow MRCOOL® install manual and local electrical code)

Line Sets (Included)

(2) DIY25-1438-O – 25 ft Pre-Charged R-454B QuickConnect® Line Sets

Line Set Length: 25 ft each
Liquid Line: 1/4”
Suction Line: 3/8”
Factory pre-charged for DIY 6k, 9k & 12k indoor units

 
Indoor Air Handlers (each DIY-12-HP-WMAH-230D25-O)

Capacity: 12,000 BTU
Mount Type: Wall
Max Coverage: ~550 sq. ft.
Voltage: 208/230V, 1-Phase, 60 Hz
Filter Type: Reusable
Modes: Cool, Heat, Dry, Fan, Auto, Sleep, Quiet
Smart Control: WiFi app + Alexa + Google Assistant
Net Dimensions (each): 7.44” D x 11.63” H x 31.57” W
Net Weight: 24.47 lbs

Outdoor Condenser (DIY-MULTI4-27HP230D-O)

Net Dimensions: 16.14” D x 31.89” H x 37.24” W
Net Weight: 140.21 lbs
Compressor Type: Rotary, DC Inverter
Zone Capacity: Up to 4 indoor units

Certifications

UL Listed
ETL Listed
AHRI Certified
ENERGY STAR® (for qualifying series units)
Proposition 65 Compliant

 
 
What’s Included (Bundle Contents)
IN THIS COMPLETE DIY BUNDLE – MRCOOL DIYM227HPW04D06:

(1) DIY-MULTI4-27HP230D-O – 27k BTU 4-Zone Multi-Zone Outdoor Condenser (230V, R-454B)
(2) DIY-12-HP-WMAH-230D25-O – 12k BTU DIY 5th Gen Wall-Mount Air Handlers (up to 550 sq. ft. each)
(2) DIY25-1438-O – 25 ft Pre-Charged R-454B QuickConnect® Line Sets (1/4” x 3/8”)
Wireless remotes for each 12k indoor unit
DIYPRO® cable and install hardware as supplied by MRCOOL®
Manufacturer installation manuals and warranty documentation

 
Frequently Asked Questions (FAQ)
 

Q: How many rooms can this bundle handle?
A: Out of the box, DIYM227HPW04D06 is designed for two zones, each with a 12k BTU wall-mount air handler—ideal for two rooms up to ~550 sq. ft. each. The condenser can support up to four indoor units, so you can expand later.
 
Q: What breaker size do I need?
A: The DIY-MULTI4-27HP230D-O condenser calls for a maximum 25A fuse/breaker and 23A MCA. Always have a licensed electrician size the breaker and wire per local code.
 
Q: Are the line sets pre-charged for DIY install?
A: Yes. Both DIY25-1438-O line sets are factory pre-charged with R-454B and use QuickConnect® fittings. No vacuum pump or handling refrigerant is required.
 
Q: Can I add more indoor units in the future?
A: Yes. This 27k multi-zone condenser supports up to four indoor units total. This bundle uses two 12k wall mounts, leaving two ports/BTU capacity for additional MRCOOL® DIY indoor units (within MRCOOL’s sizing guidelines).
 
Q: Is this good for bedrooms or living areas?
A: Perfect. The 12k DIY 5th Gen wall mounts are a sweet spot for medium bedrooms, offices, family rooms, bonus rooms, or small apartments. Each zone has independent temperature control and quiet operation.
 
Q: Who can help me confirm if DIYM227HPW04D06 is right for my home?
A: MRCOOL Direct can help you compare bundles, check room sizes, and answer installation questions so you choose the right system before you buy.
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