MRCOOL — Wall Mount
MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O
MRCOOL Olympus 4th Gen Wall AH 12,000 BTU (1 Ton) – O-12-HP-WMAH-230C-O
Overview
Tailored for rooms up to 550 sq. ft., the ESTAR® 12K wall unit blends compact styling, quick installation, and quiet comfort down to 19.5 dBA. Control it your way—Wi-Fi app, voice commands, or the included remote. Featuring up to SEER2 25.5 efficiency and R-454B refrigerant, it reduces energy use while maintaining steady, even temperatures in bedrooms, home offices, and similar spaces. Includes limited lifetime, 7-year compressor, and 5-year parts coverage.
Quick Facts
- Capacity: 12,000 BTU (1 Ton)
- Coverage: Up to 550 sq. ft.
- Refrigerant: R-454B
- Voltage/Phase/Frequency: 208/230V, 1-Phase, 60 Hz
- Sound: 47 / 36.5 / 32.5 / 22 / 19.5 dBA
- Fan Speeds: 5 (Variable) with Oscillation
- Smart Control: Wi-Fi + App + Alexa/Google
Use our sizing calculator ().
Works With (Outdoor Units)
O-ES-12-HP-C-230C-O1, MULTI3-18HP230C-O, MULTI4-27HP230C-O, MULTI5-36HP230C-O, MULTI6-48HP230C-O
Key Features
- Compact wall-mount design
- Quiet down to 19.5 dBA
- R-454B refrigerant
- Wi-Fi/app/voice + remote
Technical Specifications
| Specification | Details |
|---|---|
| Brand / Series | MRCOOL / Olympus 4th Gen Air Handlers |
| Model | O-12-HP-WMAH-230C-O |
| GTIN / UPC | 00840255587716 / 840255587716 |
| Unit Type | Mini-Split |
| Tonnage | 1 |
| Voltage / Phase / Cycle | 208/230V / 1-Phase / 60 Hz |
| Max Fuse Breaker | 15 A |
| Min Circuit Ampacity | 3 A |
| Mount Type | Wall |
| Color | White |
| Max Coverage Area | Up to 550 |
| Refrigerant Type | R-454B |
| Sound (dBA) | 47 / 36.5 / 32.5 / 22 / 19.5 |
| Number of Speeds | 5 (Variable) |
| Oscillation | Yes |
| Lineset Fitting Type | Flare |
| Liquid / Suction Line | 1/4" / 3/8" |
| Blower Motor Speeds (CFM) | 441.4 / 323.7 / 229.6 / 176.6 / 147.2 |
| Blower Motor RPM | 1100 / 850 / 700 |
| Filter Type | Reusable |
| Aux Heater (Incl/Avail) | No / No |
| Fan Only / Sleep / Auto Cool | Yes / Yes / Yes |
| Wi-Fi / App / iOS / Android | Yes / Yes / Yes / Yes |
| Remote Included | Yes |
| UL / CSA / ETL Listed | Yes / Yes / Yes |
| Prop 65 | Yes |
| Restricted States | GU, PR, VI |
| Net Dimensions (HxWxD) | 11.81" × 33.74" × 9.09" |
| Net / Gross Weight | 22.93 lbs / 29.32 lbs |
| Gross Dimensions (HxWxD) | 14.57" × 36.22" × 12.2" |
Warranty Information
- Limited Lifetime (see MRCOOL terms)
- 7-Year Compressor Coverage
- 5-Year Parts Warranty
Manuals & Downloads
Please note: Indoor air handler must be matched with a compatible MRCOOL outdoor unit.
