DIY-09-HP-WMAH-230C25
Description
The MRCOOL DIY 9K BTU Ductless Wall Mounted Air Handler is one of the most efficient options for home comfort, delivering an impressive 22 SEER efficiency rating while effectively cooling and heating areas up to 375 sq. ft. This unit is perfect for small spaces and offers exceptional versatility with multiple operating modes, including COOL, HEAT, AUTO, DRY (dehumidification), and SLEEP.
For maximum convenience, you can control the system remotely via your Apple or Android smartphone using the SmartHVAC® app. Its lightweight, compact design allows for easy installation on most interior walls using the included mounting plate.
Simplifying installation even further, this air handler is compatible with MRCOOL’s patented Pre-Charged Quick Connect® Line Set, featuring quick connectors for easy setup using basic hand tools. The line set comes pre-charged with the correct amount of R-410A refrigerant, eliminating the need for vacuuming.
Backed by industry-leading protection when enrolled in the Cool Care Program—including limited lifetime compressor coverage, a 7-year unit replacement program, and 5 years of parts coverage, the MRCOOL DIY 9K BTU Ductless Wall Mounted Air Handler delivers reliable, long-lasting comfort and peace of mind.
Let the MRCOOL DIY 9K BTU Ductless Wall Mounted Air Handler provide the heating and cooling performance your home needs with ease and efficiency.
Find the Brochure HERE
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Key Specs (Performance Specs Click Here)
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Smart Features:
- SmartHVAC App: WiFi control to operate the system remotely using your Apple or Android smart device and an internet connection.
- Amazon Alexa and Google Assistant compatibility for voice control.
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Warranty:
- 7-year compressor warranty
- 5-year parts warranty
- Option to register for a limited lifetime compressor warranty.
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Safety Features:
- Includes the DIY Pro™ Cable, an added safety feature to protect wiring from outdoor elements.
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Compatibility
DIY 4th Gen Multi-Zone Condensers
DIY Pre-Charged Line Sets 1/4"-1/2"
MMCFOA Cool Care Program Kit - Foaming Cleanser Only
Disclaimer:
The compatibility information provided in this article is specific to units within the same series. While additional compatibility with other series and units may exist, it is not detailed here. For further assistance or confirmation of compatibility with other systems, please contact MRCOOL support.
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Warranty
The MRCOOL warranty offers comprehensive coverage for your unit, even with DIY self-installation.

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Quick Links
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📞 (270) 366-0457
📧 support@mrcool.com
📝 Submit a support ticket
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