Shopping Perspective｜MRCOOL® 27k 5th Gen 4-Zone DIY® Multi-Zone Bundle (12k + 12k) Air Handlers, (16ft + 16ft) Pre Charged R-454B Line Sets, 230V) — DIYM227HPW04D00

Product Description 
Model: DIYM227HPW04D00
 
Short Description
The MRCOOL DIYM227HPW04D00 bundle combines the 27k DIY-MULTI4-27HP230D-O 4-zone condenser with two 12k DIY 5th Gen wall-mount air handlers and two 16 ft pre-charged QuickConnect® R-454B line sets. This factory-matched DIY mini split system is perfect for two rooms up to ~550 sq. ft. each, with expansion room for up to four indoor units total. Get high-efficiency heating and cooling, smart controls, and true DIY installation
 
Long Product Description 
Overview: 27k Multi-Zone DIY System with (2) 12k Zones
The MRCOOL® DIYM227HPW04D00 bundle is a 5th Generation multi-zone kit built around the proven DIY-MULTI4-27HP230D-O 27k BTU condenser and two 12k DIY wall-mount air handlers (DIY-12-HP-WMAH-230D25-O).
 
This setup is ideal when you want to:

Heat and cool two medium-sized rooms up to ~550 sq. ft. each, and
Keep the option open to add up to two more indoor units later on the same outdoor condenser.

 
This complete DIY bundle includes:

(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 5th Gen DIY Wall-Mount Air Handlers
(2) DIY16-1438-O – 16 ft Pre-Charged R-454B QuickConnect® Line Sets (1/4” x 3/8”)

With efficiency up to 23 SEER2 and 9.5 HSPF2-4, this MRCOOL DIY multi-zone mini split gives you efficient comfort and serious utility-bill savings compared to old-school systems.
 
 
True DIY Install with Pre-Charged QuickConnect® Line Sets
The entire MRCOOL® DIY line is built so homeowners don’t have to call a contractor, and DIYM227HPW04D00 is no exception:

(2) DIY16-1438-O 16 ft QuickConnect® line sets included – each line set is factory pre-charged with R-454B refrigerant.
No vacuum pump, no gauges, no refrigerant handling. Just connect the QuickConnect® fittings per MRCOOL’s installation instructions.
DIYPRO® cable (where applicable) eliminates traditional electrical conduit and adds protection against weather, pets, and yard tools.

 
If you can mount a TV and follow a step-by-step guide, you’re in MRCOOL DIY territory.
 
 
Two 12k Zones for Real-World Spaces
This bundle gives you two balanced 12k BTU zones using the DIY-12-HP-WMAH-230D25-O wall-mount air handlers:
Each 12k indoor unit is ideal for:

Bedrooms and primary suites
Home offices or bonus rooms
Medium living rooms or dens
Finished basements, shops, or studio spaces

Rated for up to ~550 sq. ft. per zone, you get strong coverage for two rooms while still having two extra ports on the 27k condenser if you want to add more MRCOOL DIY indoor units later.
Smart, Quiet, and Fully Zoned Control

Every 12k DIY 5th Gen wall mount in this DIYM227HPW04D00 bundle comes fully loaded:

SmartHVAC® app for iOS and Android
Alexa & Google Assistant voice control
Follow Me® function so the system conditions the air around the remote
Modes for Heat, Cool, Dry, Fan, Auto, Sleep, Quiet

 
The DIY-MULTI4-27HP230D-O condenser uses a DC inverter compressor to ramp up and down smoothly, improving comfort, cutting energy use, and keeping noise levels low indoors and outside.
R-454B 5th Gen Efficiency & Future-Ready Design
This 5th Generation MRCOOL® DIY system uses R-454B, the next-generation low-GWP refrigerant:

High-efficiency: 23 SEER2, 12 EER2, 9.5 HSPF2-4
Designed to support up to 4 indoor units on a single outdoor condenser
Strong heating and cooling performance in a wide range of climates

The result: a future-ready DIY multi-zone mini split that keeps your home comfortable and your power bill in check.
 
Why Buy This Bundle from the USA’s #1 Most Trusted MRCOOL Dealer
When you order DIYM227HPW04D00 from MRCOOL Direct – the USA’s #1 most trusted MRCOOL dealer, you get:

A factory-matched bundle with all compatible components under one model
Fast, knowledgeable help with room sizing, layout, and electrical questions
Support from people who live and breathe MRCOOL DIY systems
Peace of mind that you’re getting genuine new 5th Gen R-454B product

 
If you’re not sure whether two 12k zones is right for your home, call us before you buy and we’ll walk through your floorplan and suggest the right DIY bundle.
 
Key Specifications
System Type

Brand: MRCOOL®
Series: DIY 5th Gen Multi-Zone Mini-Splits
Bundle Model: DIYM227HPW04D00
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 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 (with 2 zones active): ~900–1,100 sq. ft., depending on insulation, layout, 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: powered and controlled from condenser (control/power wiring; follow MRCOOL® manual and local codes)

Line Sets (Included)

(2) DIY16-1438-O – 16 ft R-454B Pre-Charged QuickConnect® Line Sets

Line Set Length: 16 ft each
Liquid Line: 1/4”
Suction Line: 3/8”
Pre-charged for DIY 6k, 9k & 12k indoor units

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

Capacity: 12,000 BTU
Mount Type: Wall-Mount Ductless Air Handler
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 + SmartHVAC 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 DIYM227HPW04D00:

(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 (each up to ~550 sq. ft.)
(2) DIY16-1438-O – 16 ft R-454B Pre-Charged QuickConnect® Line Sets (1/4” x 3/8”)
(2) Wireless remotes – one for each indoor unit
DIYPRO® cable and mounting hardware as supplied by MRCOOL®
MRCOOL® installation manuals & warranty registration information

 
 Frequently Asked Questions (FAQ)
Q: How many rooms can this system handle out of the box?
A: DIYM227HPW04D00 is designed for two 12k zones—perfect for two rooms up to ~550 sq. ft. each. The 27k condenser can support up to four indoor units total, so you can add more MRCOOL DIY air handlers later.
 
Q: What size breaker does the outdoor unit need?
A: The DIY-MULTI4-27HP230D-O condenser calls for a maximum 25A fuse/breaker and 23A MCA. Always confirm wire size and breaker selection with a licensed electrician and your local electrical code.
 
Q: Are the line sets included and pre-charged?
A: Yes. This bundle includes (2) DIY16-1438-O 16 ft line sets, each factory pre-charged with R-454B and using QuickConnect® fittings for true DIY installation—no vacuuming or refrigerant handling required.
 
Q: What kind of spaces is this bundle best for?
A: This setup is ideal for two medium-sized spaces like bedrooms, offices, living rooms, bonus rooms, studios, or finished basements where you want independent temperature control in each zone.
 
Q: Can I control everything from my phone?
A: Yes. The system supports the SmartHVAC® app, plus Amazon Alexa and Google Assistant, so you can adjust temperature, modes, and schedules from your phone or with your voice.
 
Q: Who can help me confirm if DIYM227HPW04D00 is the right bundle?
A: MRCOOL Direct is the USA’s #1 most trusted MRCOOL dealer. Call us and we’ll help verify your room sizes, layout, and electrical so you pick the right DIY bundle the first time.
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