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DIY-12-HP-WMAH-230C25 DIY 4th Generation Heat Pump Wall Mount Air Handler, 22 SEER Rating, 12K BTU

Regular price $574.00 USD
Regular price Sale price $574.00 USD
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Shipping calculated at checkout.

Benefits & Features

✅SmartHVAC App: WIFI control - control your DIY anywhere with your Apple or Android smart device and an Internet connection
✅Quick DIY Installation: Easily mount on most interior walls using the included plate.
✅Pre-Charged Line Set: Simplifies installation without vacuuming.
✅Auto Cool, Quiet, Fan Only Options: Customize your comfort effortlessly.
✅Environmentally Friendly: Uses R-410A refrigerant for eco-conscious cooling.


Item Color: White
Item Dimensions: 31.57" (W) x 7.44" (D) x 11.69" (H)
Item Weight: 23.81 lbs
Liquid Line Size: 1/4"
Suction Line Size: 1/2"
Refrigerant Type: R-410A
Decibel Rating: 35 dBA (Low: 25 dBA, High: 40 dBA)
Mount Type: Wall Mount
Coverage Area (Max): Up to 500ft²
Blower Motor: 1050/850/650 RPM
SEER: 22
Cooling Capacity: 9,000 BTU
Heating Capacity: 9,000 BTU
Voltage: 208-230V
Phase: 1
Cycle: 60
Fuse Breaker (Max): 15A
Circuit Ampacity(Min): 3A

The MRCOOL® DIY 12K BTU Wall Mounted Air Handler is a compact powerhouse for versatile climate control. With modes like COOL, HEAT, AUTO, DRY, and SLEEP, managed through the Smart HVAC app, its 22 SEER rating efficiently covers up to 500 sq. ft. Easy installation, a noise range of 25–40 dBA, and eco-friendly R-410A refrigerant make it a smart choice for personalized comfort. Embrace efficiency and innovation with MRCOOL® – where expert cooling meets your lifestyle.


  • DIY Pro™ Cable (added safety feature to protect wiring from outside elements)

Matchup this with other MrCool Outdoor Multi-Zone Condensers:


Install Manual,
Service Manual,
Remote Manual,
Specification Sheet,

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Frequently Asked Questions about the DIY-12-HP-WMAH-230C25 DIY 4th Generation Heat Pump Wall Mount Air Handler, 22 SEER Rating, 12K BTU

What is a wall mount air handler?

A wall mount air handler is a device used in HVAC systems to distribute conditioned air into a living or working space. It is typically mounted on a wall and contains components for both heating and cooling.

How does a wall mount air handler work?

The unit pulls in air from the space, conditions it using a refrigeration cycle, and then distributes the conditioned air back into the room through the wall-mounted unit.

What are the advantages of wall mount air handlers?

Wall mount air handlers are space-saving, provide efficient heating and cooling, and offer flexibility in installation, making them suitable for various applications.

Can I install a wall mount air handler in any room?

Yes, wall mount air handlers are designed to fit in most interior spaces, providing versatility and adaptability to different room layouts.

How do I control a wall mount air handler?

Many wall mount air handlers, including the MRCOOL® DIY model, can be controlled through a SmartHVAC app on your Apple or Android smartphone.