MRCOOL DIY 12,000 BTU Select Single Zone Wall Mounted Mini Split Air Handler – R454B | 115V
The MRCOOL DIY 12,000 BTU Select Single Zone Wall Mounted Mini Split Air Handler is designed to efficiently heat and cool spaces up to approximately 400 – 600 square feet. Featuring quiet operation, smart comfort technology, and DIY-friendly compatibility, this air handler pairs seamlessly with compatible MRCOOL DIY Select condensers for reliable year-round performance.
Key Features
- Up to 17.5 SEER2 efficiency when paired with compatible MRCOOL DIY Select condensers
- 12,000 BTU heating and cooling capacity for medium-sized rooms
- Wall-mounted design with Quick Connect compatibility for simplified DIY installation
- Ultra-quiet performance with sound levels as low as 17.5 dB(A)
- Designed to pair with compatible mini split components
Warranty
MRCOOL provides a limited manufacturer warranty with eligible registration coverage for parts and compressor protection when installed according to manufacturer specifications.








