MRCOOL Olympus 4th Gen 18,000 BTU R-454B Wall Mount Air Handler 208/230V O-18-HP-WMAH-230C-O
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Enjoy peace of mind and reliable comfort with the MRCOOL® OLYMPUS ESTAR® 18k Series air handler, designed to efficiently heat and cool areas up to 800 square feet—making it an ideal choice for large rooms, offices, garages, and more. Thanks to its compact design, installation is fast and straightforward.
Control your comfort from anywhere with the MRCOOL® Smart HVAC app, which allows Wi-Fi connectivity for remote access via your smartphone or tablet. For added convenience, the unit also includes a wireless remote control, giving you flexible options to manage your indoor climate with ease.
Engineered for energy efficiency, this system features a SEER2 rating of 23.5, EER2 of 12.7, and HSPF2-4 of 10.8, helping you lower your utility costs while staying comfortable year-round. With multiple fan speed settings and whisper-quiet operation at just 49 dB, it delivers powerful performance with minimal noise.
Now using R-454B refrigerant, a more eco-friendly choice, this unit supports environmentally conscious living without sacrificing performance.
Enjoy seamless control options, including the smartHVAC app, wireless remote, and voice control compatibility with Amazon Alexa and Google Assistant, giving you personalized comfort at your fingertips.
Backed by an industry-leading warranty—including a 7-year compressor warranty and 5-year parts warranty—the MRCOOL® OLYMPUS ESTAR® 18k Series air handler offers dependable performance, smart technology, and lasting comfort throughout the seasons.
Technical Specifications
| Tonnage | 1.5 Ton |
| Cooling Capacity | 18,000 BTU |
| SEER2 | 23.5 |
| EER2 | 12.7 |
| HSPF2-4 | 10.8 |
| Voltage | 208/230V |
| Phase | 1 |
| Frequency | 60 Hz |
| Max Fuse/Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Refrigerant Type | R-454B |
| Sound Level (dBA) | 49.5 / 45 / 38 / 31.5 / 19.5 |
| Blower Motor Speeds (RPM) | 635.7 / 500.3 / 359 / 294.3 / 294.3 |
| Filter Type | Reusable |
| Max Coverage Area | Up to 800 sq. ft. |
| Color | White |
| Net Dimensions (D × H × W) | 9.69 × 12.64 × 40.31 in |
| Net Weight | 27.34 lbs |
| Gross Dimensions (D × H × W) | 12.8 × 15.75 × 43.11 in |
| Gross Weight | 36.6 lbs |
Certifications
- UL Listed
- ETL Listed
- CSA Listed
Warranty
- 5-Year Parts Warranty
- 7-Year Compressor Warranty
Product Documentation
- MRCOOL Olympus 4th Gen Air Handler Installation Manual (PDF)
- MRCOOL Olympus 4th Gen Air Handler Warranty Document (PDF)
- MRCOOL Olympus 4th Gen Air Handler Brochure (PDF)
- MRCOOL Olympus 4th Gen 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.