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DIY-09-HP-WMAH-230C25 DIY 4th Generation Heat Pump Wall Mount Air Handler, 22 SEER Rating, 9K BTU

Regular price $442.00 USD
Regular price Sale price $442.00 USD
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Shipping calculated at checkout.

Benefits & Features

✅ SmartHVAC App: Enjoy WIFI control and manage your DIY system from anywhere using your Apple or Android smart device with an Internet connection.
✅ Easy Connection: Seamlessly connect and integrate the MRCOOL® DIY 9K BTU Ductless Wall Mounted Air Handler.
✅ Fits in Any Home: Its versatile design ensures compatibility and suitability for installation in various home settings.
✅ Quick DIY Installation: Experience hassle-free installation on most interior walls with the included mounting plate.
✅ Pre-Charged Line Set: Benefit from the convenience of MrCool’s Pre-Charged Quick Connect Line Set, allowing straightforward installation without the need for vacuuming.


Item Color: White
Item Dimension: 31.57" (W) x 7.44" (D) x 11.69" (H)
Item Weight: 23.81 lbs
Installation Specifications:
Liquid Line Size: 1/4"
Suction Line Size: 1/2"
Mount Type: Wall Mount
Coverage Area (Max): Up to 375ft²
Blower Motor: 1050/850/650 RPM
Noise Levels:
Decibel Rating: 35 dBA
Noise Level (Low): 25 dBA
Noise Level (High): 40 dBA
Performance Specifications:
SEER: 22
Cooling Capacity: 9,000 BTU
Heating Capacity: 9,000 BTU
Electrical Specifications:
Phase: 1
Cycle: 60
Voltage: 208-230
Fuse Breaker (Max): 15A
Circuit Ampacity (Min): 3A
Additional Information:
Prop 65 Warning: YES

Made in the USA, the MRCOOL® DIY 9K BTU Ductless Wall Mounted Air Handler delivers expert-level HVAC efficiency with a remarkable 22 SEER rating. This versatile unit covers up to 375 sq. ft, offering COOL, HEAT, AUTO, DRY, and SLEEP modes. Control it effortlessly through the Smart HVAC app on your Apple or Android smartphone, ensuring seamless heating and cooling management. Lightweight and easy to install on most interior walls, this air handler brings unparalleled convenience to your home.


  • 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-09-HP-WMAH-230C25 DIY 4th Generation Heat Pump Wall Mount Air Handler, 22 SEER Rating, 9K 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.