MRCOOL® 36k 5th Gen DIY® Multi-Zone (12K + 18K) Air Handler with (25ft & 35ft) Pre-Charged R-454B Line Sets, (230V)- DIYM236HPW05D08

Product Description 

Model: DIYM236HPW05D08

 

The MRCOOL DIYM236HPW05D08 bundle is a 5th Generation 36,000 BTU DIY multi-zone system designed for homes that need two zones with different line set distances. It pairs the 36k multi-zone condenser with a 12K wall mount, an 18K wall mount, a 25 ft pre-charged line set, and a 35 ft pre-charged line set for a flexible, true DIY installation.

This kit is perfect when:

• The 12K zone is closer to the outdoor unit
• The 18K zone is farther away and needs extra line length

You get up to roughly 1,300–1,350 sq. ft. of coverage in many homes, smart controls, R-454B refrigerant, and MRCOOL’s famous Quick-Connect® design so you can install the refrigerant circuit yourself when you follow their instructions.

 

 

What’s Included in the MRCOOL DIYM236HPW05D08 Bundle

✔ 36,000 BTU 5th Gen DIY Multi-Zone Condenser — 

DIY-MULTI5-36HP230D-O

The heart of the bundle is the DIY-MULTI5-36HP230D-O, a 36,000 BTU, 5-zone ready 5th Gen DIY multi-zone condenser.

• Capacity: 36,000 BTU
• Zones: Supports up to 5 indoor units
• Efficiency: 23 SEER2, 12 EER2, 9.9 HSPF2-4, 7.5 HSPF2-5
• Refrigerant: R-454B next-gen refrigerant
• Quick-Connect® ports for MRCOOL DIY pre-charged line sets
• Smart control: SmartHVAC® app + Alexa & Google Assistant
• Inverter DC compressor for efficient, modulating operation
• Gold Fin® corrosion-resistant outdoor coil
• Ideal platform for multi-zone DIY setups up to ~1,500 sq. ft. in many installs

 

Condenser Electrical Specs

• Voltage: 208/230V, 1-phase, 60 Hz
• Minimum Circuit Ampacity (MCA): 30.5A
• Maximum Fuse / Breaker: 35A

 

 

✔ 12,000 BTU DIY 5th Gen Wall Mount Air Handler — 

DIY-12-HP-WMAH-230D25-O

The DIY-12-HP-WMAH-230D25-O is a 12,000 BTU 5th Gen DIY wall mount air handler, ideal for spaces up to about 550 sq. ft.

• Great for bedrooms, offices, and smaller living spaces
• Matches the included DIY25-1438-O line set (25 ft, 1/4” × 3/8”)
• Includes DIYPRO® cable to simplify electrical routing

 

Comfort & Features:

• Wireless remote included
• SmartHVAC® app control on iOS & Android
• Voice control with Amazon Alexa & Google Assistant
• Follow Me® temperature sensing at the remote
• Dry Mode for humidity control
• Multi-speed fan, oscillating louvers, and Quiet Mode for low noise

 

 

✔ 18,000 BTU DIY 5th Gen Wall Mount Air Handler — 

DIY-18-HP-WMAH-230D25-O

The DIY-18-HP-WMAH-230D25-O is a 1.5 ton / 18,000 BTU DIY wall mount air handler designed for larger zones up to about 800 sq. ft.

• Perfect for living rooms, master suites, and big open areas
• Uses a larger suction line and pairs perfectly with the DIY35-1412C-O 35 ft line set
• Includes DIYPRO® cable

 

Key Features:

• Wireless remote with Follow Me®
• SmartHVAC® app, Alexa, and Google Assistant support
• Dry Mode to help remove excess humidity
• Quiet Mode, oscillation, and multiple fan speeds
• Energy Star, UL, ETL, AHRI certified (per MRCOOL specs)

Important Electrical Info (air handler circuit):

• Tonnage: 1.5 ton
• Voltage: 208/230V, 1-phase, 60 Hz
• Max Fuse Breaker: 15A
• Min Circuit Ampacity: 3A

The air handlers are powered by the communication wire from condenser. 

 

✔ 25 ft 1/4” × 3/8” Pre-Charged Line Set — 

DIY25-1438-O

The DIY25-1438-O is a 25 ft pre-charged R-454B line set designed for smaller DIY air handlers.

• Length: 25 ft
• Size: 1/4” liquid × 3/8” suction
• Designed for 6K, 9K & 12K MRCOOL DIY indoor units
• Pre-charged with R-454B and sealed from the factory
• Quick-Connect® fittings for true DIY installation (no vacuum pump when installed per MRCOOL instructions)
• Perfect match for the 12K DIY air handler when it’s relatively close to the outdoor unit

 

 

✔ 35 ft 1/4” × 1/2” Pre-Charged Line Set — 

DIY35-1412C-O

The DIY35-1412C-O line set gives you extra reach for the bigger zone. It’s a 35 ft pre-charged R-454B Quick-Connect® line set designed for larger DIY heads.

• Length: 35 ft
• Size: 1/4” liquid × 1/2” suction
• Intended for 9K, 12K & 18K MRCOOL DIY indoor units that use the 1/2” suction connection
• Pre-charged with R-454B, sealed and ready from the factory
• Quick-Connect® fittings so you don’t need to pull a vacuum when you follow MRCOOL’s procedure
• Ideal when the 18K zone is further from the condenser (longer run, back of the house, upstairs, etc.)

 

 

Why Choose the DIYM236HPW05D08 Layout?

This bundle is specifically tuned for asymmetric distances:

• 12K zone: closer to the condenser — uses 25 ft line set
• 18K zone: farther away — uses 35 ft line set

That makes it an excellent choice for:

• Homes where the living room or main area (18K) is much farther from the outdoor pad
• Installations where the bedroom (12K) is closer, but the main zone is across the house
• Two-zone upgrades where you’re limited on condenser location but still want ideal head placement

You still get:

• True DIY refrigerant circuit with pre-charged R-454B line sets
• Independent temperature control for each zone
• A powerful 36k 5-zone platform you can expand later with additional DIY indoor units

 

FAQ – MRCOOL DIYM236HPW05D08 36k 5th Gen DIY Multi-Zone Bundle (12K + 18K, 25ft & 35ft Line Sets)

1. What’s the difference between DIYM236HPW05D08 and DIYM236HPW05D07?

Both are 12K + 18K two-zone bundles on the 36k 5-zone condenser. The difference is line length:

• 05D07: both zones use 25 ft line sets
• 05D08: 12K uses 25 ft, 18K uses 35 ft

 Use this bundle when your 18K zone is farther from the outdoor unit.

 

 

2. Is this still a true DIY system?

Yes. All MRCOOL DIY line sets (including DIY25-1438-O and DIY35-1412C-O) are factory pre-charged with R-454B and use Quick-Connect® fittings, so you don’t handle refrigerant when you follow MRCOOL’s DIY instructions.

 

 

3. What breaker size do I need for the outdoor unit?

For the DIY-MULTI5-36HP230D-O:

• Minimum Circuit Ampacity (MCA): 30.5A
• Maximum Fuse / Breaker: 35A

Always have a qualified electrician size the wire and breaker to meet MRCOOL’s manual and local code.

 

 

4. How much space will this bundle cover?

Approximate coverage:

• 12K zone: up to ~550 sq. ft.
• 18K zone: up to ~800 sq. ft.

Total around 1,300–1,350 sq. ft., depending on climate, insulation, ceiling height, and layout.

 

5. Can I add more indoor units later?

Yes. The 36k multi-zone condenser can support additional compatible MRCOOL DIY indoor units, as long as you stay within the BTU and port limits in MRCOOL’s engineering data.

 

6. Is the 35 ft line set okay for performance?

Yes—MRCOOL designs their DIY line sets and condensers to support listed maximum total and individual line lengths. This 35 ft kit is a common option where you need a longer run to the 18K head.

 

7. Do both indoor units have independent temperature control?

Yes. The 12K and 18K air handlers each have their own remote, their own WiFi control, and separate setpoints, fan speeds, and modes.

 

8. Does this system help manage humidity?

Yes. Both indoor units feature DRY MODE, which helps reduce humidity in the space during cooling.

 

 

9. Does this work with Alexa and Google Assistant?

Yes. With the SmartHVAC® module and app, the system supports Amazon Alexa and Google Assistant voice control.

 

 

10. What kind of warranty does MRCOOL offer on this bundle?

When properly installed and registered:

• 5-year parts warranty
• 7-year compressor warranty
• Eligible for the  MRCOOL® Care Program (see MRCOOL terms).

 

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!

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