MRCOOL
MRCOOL Olympus 12,000 BTU 1 Ton Ductless Mini-Split Wall Mounted Air Handler - 230V/60Hz
O-12-HP-WMAH-230C-O
12,000 BTU · 208/230V · R-454B
Part of Olympus 4th Gen – Air Handlers
- Cooling capacity
- 12,000 BTU1 ton
- Room size
- Up to 550
- Power
- 208/230V15A breaker
- Refrigerant
- R-454B
$401.00 each
Not sure about the size? Use the BTU sizing calculator, or call us and we'll size it with you. Professional installation by a licensed HVAC contractor is required for the manufacturer warranty.
Build a multi-zone system with this air handler →
Distributor pricing and stock: call 678-467-5515 or email sales@discountkings.net.
About this product
Experience dependable heating and cooling with the MRCOOL® OLYMPUS ESTAR® 12k Series 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 for your technician. Stay in control from anywhere with the MRCOOL® Smart HVAC app, which connects via Wi-Fi to your smartphone or tablet. Prefer a more hands-on approach? Use the included remote control for 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. A variety of indoor fan speeds ensures optimal comfort, while its whisper-quiet operation at just 46 dB keeps noise to a minimum. Now using R-454B refrigerant, an environmentally friendly option, this system supports a greener future without compromising performance. Enjoy multiple control options, including wireless remote access, the smartHVAC app, and voice control compatibility with Amazon Alexa and Google Assistant—giving you the flexibility to adjust your comfort your way. Backed by an industry-leading warranty, including a 7-year compressor coverage and a 5-year parts warranty, the MRCOOL® OLYMPUS ESTAR® 12k Series offers advanced features, quiet operation, and year-round comfort you can count on.
Documents & manuals
Specifications
| Type | Air handler (indoor unit) — heat pump (heats & cools) |
|---|---|
| Series | Olympus 4th Gen |
| Cooling capacity | 12,000 BTU |
| Nominal size | 1 ton |
| Coverage | Up to 550 |
| Sound level | 47/36.5/32.5/22/19.5 dBA |
| Voltage | 208/230V |
|---|---|
| Phase | 1-phase |
| Min. circuit ampacity (MCA) | 3 A |
| Max. breaker (MOP) | 15 A |
| Wi-Fi / app control | Yes |
| Refrigerant | R-454B |
|---|---|
| Liquid line | 1/4" |
| Suction line | 3/8" |
| Indoor unit / mounting | Wall |
|---|---|
| Dimensions (in) | 33.74 W × 9.09 D × 11.81 H |
| Weight | 22.93 lb |
| Shipping weight | 29.32 lb |
| Color | White |
| Safety listing | UL, ETL |
|---|---|
| Parts warranty | 5 years |
| UPC | 840255587716 |

