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MRCOOL DIY 12,000 BTU Multi-Zone Wall Mounted Air Handler with Enhanced WiFi



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Suggested Retail $675.29 Your Low Price Special Price $574.00
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Coming in as one of the first brands to offer a multi zone DIY mini split, MRCOOL offers the DIY-12-HP-WMAH-230B wall mounted air handler for use in almost any installation need while providing a simple installation process. When paired with the proper installation materials, installation is fast, convenient, and cost-effective with MRCOOL’s DIY-12-HP-WMAH-230B.


  • 12,000 BTU multi zone DIY wall mounted air handler
  • Generally suitable to cover a small room in ideal climates
  • Direct-from-manufacturer customer technical support available for all MRCOOL DIY units
  • 100% sealed and pre-charged system when installed with the right accessories
  • Energy Star certified
12,000 BTU

With a rated output of 12,000 BTU, the MRCOOL DIY-12-HP-WMAH-230B wall mounted air handler can generally heat and cool a small room in ideal climates.
Please note that in order to function, this air handler must be installed with a compatible condenser, controllers, MRCOOL precharged line sets, and other installation equipment, available at an additional cost. If you have any questions, please do not hesitate to contact us for details.


MRCOOL offers a 5 year parts and 7 year compressor warranty on their multi zone DIY units when installed following the installation instructions and registered online through the manufacturer.

Intelligent Comfort Whenever You Need It

With MRCOOL's WiFi compatibility built-in to each DIY air handler, you can control your home's comfort from anywhere in the world that you have Internet—across town or across the world. This WiFi is easily set up, further improving the ease of this unit's installation.

A DIY Installation Built to Last

When paired with MRCOOL's easy-install precharged line sets and air handlers, the DIY-12-HP-WMAH-230B is installation ready for almost any wall-mounted application. With no need to evacuate the line sets or add refrigerant, this unit can support multi-room heating and cooling without the expensive labor cost of a regular mini split. With this major obstacle out of the way, you will only need to follow the instructions for the unit and hard wire the condenser to power.

Product Specifications

More Information
MRCOOL DIY 12,000 BTU Multi-Zone Wall Mounted Air Handler with Enhanced WiFi
Weight (in lbs)23.600000
Cooling BTU12,000 BTU
Heating BTU12,000 BTU
Liquid Line1/4"
Suction Line1/2"
Electrical208/230 V. 1 Phase 60 Hz
Max Breaker Size15 Amps
Min. Breaker Size3 Amps
BTU/Tonnage12,000 BTU/1 Ton
Mini-Split TypeWall Mounted
Warranty5-year Parts / 7-year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING


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Questions and Answers

Customer Questions
What size room does this unit work for?
A 12,000 BTU unit is meant for smaller rooms, usually a maximum of 500sqft but can vary based on your location, insulation quality, etc... Please reference our Sizing Guide that will allow you to know exactly what kind of unit you'll be needing and will pull up the units that will works for your specific situation. If you have any further questions please feel free to give us a call! Thanks.
Where are they manufactured?
MRCOOL is based out of Kentucky however most of their mini-splits are manufactured in China.
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