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MRCOOL DIY 9,000 BTU Multi-Zone Wall Mounted Air Handler with Enhanced WiFi







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Coming in as one of the first brands to offer a multi zone DIY mini split, MRCOOL offers the DIY-09-HP-WMAH-230C25 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-09-HP-WMAH-230C25.


  • 9,000 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
9,000 BTU

With a rated output of 9,000 BTU, the MRCOOL DIY-09-HP-WMAH-230C25 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-09-HP-WMAH-230C25 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 9,000 BTU Multi-Zone Wall Mounted Air Handler with Enhanced WiFi
Weight (in lbs)23.800000
Cooling BTU9,000 BTU
Heating BTU9,000 BTU
Decibel Level (dBA)25-40
SEER1 (Efficiency)22
Liquid Line1/4"
Suction Line1/2"
Electrical208/230 V. 1 Phase 60 Hz
Max Breaker Size15
Min. Breaker Size3
BTU/Tonnage9,000 BTU/0.75 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
Pre-charged line extension
MRCOOL offers extension couplers that allow you to connect precharged linesets together for an extended run. In order to get to 100 ft you would need the 75 ft extension, model number: DIY25-1412 / DIYCOUPLER-1412K75
Where are they manufactured?
MRCOOL is based out of Kentucky however most of their mini-splits are manufactured in China.
Can a condensate pump be added to this unit?
Yes, a condensate pump can be added to this unit. A compatible condensate pump for this unit can be found with the accessories for this product, which are located under the , "add to cart" button or you can view the condensate pump by clicking here. In installations that require the drain line to go against gravity or where the drain line lacks a slope, a condensate pump is strongly recommended. The drain hose will exit the indoor unit on the same side as the line set. You access the drain pan through the same entrance as the air filter. However, to access the drain pan, you must first remove the air filter. For more assistance, please give us a call.
Recommended room size?
Without knowing some important information like insulation quality, geographical location, etc it can be difficult to narrow it down to an exact number. However, this unit can cover up to an estimated 250 square feet based on the conditions above. It is best to use our sizing guide. Linked below! Any further questions please feel free to give us a call! Thank you.
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