MRCOOL Olympus 4th Gen 12,000 BTU R-454B Wall Mount Air Handler 208/230V O-12-HP-WMAH-230C-O
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Experience dependable heating and cooling with the MRCOOL® Olympus 4th Gen 12K Wall Mount Air Handler, designed for spaces up to 550 square feet—perfect for bedrooms, home offices, garages, and more. Its compact design makes installation quick and hassle-free.
Stay in control from anywhere with the MRCOOL® Smart HVAC app, which connects via Wi-Fi to your smartphone or tablet. The included remote control provides simple and convenient operation.
Engineered for energy efficiency, this unit delivers strong performance with a SEER2 rating of 25.5, EER2 of 13, and HSPF2-4 of 10.6—helping you reduce energy consumption and save on utility costs. Its whisper-quiet operation keeps noise to a minimum.
Now using R-454B refrigerant, an environmentally friendly option, this system supports a greener future without compromising performance. Voice control compatibility with Amazon Alexa and Google Assistant adds further convenience.
Backed by a 7-year compressor warranty and a 5-year parts warranty, the MRCOOL® Olympus 4th Gen 12K Wall Mount Air Handler offers advanced features, quiet operation, and year-round comfort you can count on.
Technical Specifications
| Tonnage | 1 Ton |
| Voltage | 208/230 V |
| Phase | 1 |
| Frequency | 60 Hz |
| Max Fuse/Breaker | 15 A |
| Min Circuit Ampacity | 3 A |
| Refrigerant Type | R-454B |
| Max Coverage Area | Up to 550 sq ft |
| Liquid Line Size | 1/4" |
| Suction Line Size | 3/8" |
| Wi-Fi Compatible | Yes |
| App Compatible | Yes |
| Net Dimensions (D×H×W) | 9.09" × 11.81" × 33.74" |
| Net Weight | 22.93 lbs |
| Gross Dimensions (D×H×W) | 12.2" × 14.57" × 36.22" |
| Gross Weight | 29.32 lbs |
Certifications
- UL Listed
- CSA Listed
- ETL Listed
Warranty
- 5-Year Parts Warranty
- 7-Year Compressor Warranty
Product Documentation
- MRCOOL Olympus 4th Gen 12K Wall Mount Air Handler Installation Manual (PDF)
- MRCOOL Olympus 4th Gen 12K Wall Mount Air Handler Warranty Document (PDF)
- MRCOOL Olympus 4th Gen 12K Wall Mount Air Handler Brochure (PDF)
- MRCOOL Olympus 4th Gen 12K Wall Mount Air Handler Service Manual (PDF)
- MRCOOL Olympus 4th Gen 12K Wall Mount Air Handler Performance Specification Sheet (PDF)
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.