How the MrCool Olympus 12,000 BTU Mini Split Is Built
This single-zone ductless system pairs one wall-mounted indoor unit with one outdoor heat pump condenser. It delivers 12,000 BTU of cooling and 12,000 BTU of heating, enough for a room of up to about 500 sq ft. An inverter compressor varies its speed to match the load, holding a set temperature without hard on-off cycling. Efficiency is rated at 22.7 SEER, 13.7 EER and 11 HSPF, and the system carries Energy Star certification. Heating continues at outdoor temperatures as low as -13 F. Modes include Auto, Cool, Dry, Heat, Fan and Sleep, set from the included remote. A SmartHVAC WiFi module adds phone control, with Amazon Alexa and Google Assistant support. The indoor unit runs at 25 to 40 dB(A), so it stays quiet in an occupied space. It runs on 230V, 60Hz power and ships with a 25 ft line set. Line runs can reach up to 82 ft, and installation is designed for an HVAC technician. Registered, professionally installed systems carry a 7-year compressor and 5-year parts warranty.
Running a 1 Ton Mini Split in a Grow Room
A 1 ton mini split works well in a sealed grow room or small greenhouse where windows and exhaust alone cannot hold temperature. Size for the heat the lights add, since a lit room needs far more cooling per square foot than a home. Mount the indoor head high on a wall where its airflow can reach across the canopy. In a long room, add oscillating fans so the conditioned air reaches the far end. Use Dry mode when humidity climbs during the dark period. Switch to Heat on cold nights so the room does not swing too far once the lights go off. Set schedules in the app so cooling ramps up as the lights come on. Keep the outdoor condenser clear of leaves, snow and debris so it can move air freely. Clean the indoor filters regularly, since dust and plant debris build up quickly in a grow space. Have the technician who installs the system confirm the circuit and breaker size for your service.
Key Features
- 12,000 BTU, 1 ton: Cools and heats rooms up to about 500 sq ft.
- 22.7 SEER, Energy Star: Inverter compressor matches output to the load.
- Heats to -13 F: Heat pump keeps working in cold weather.
- WiFi and voice control: SmartHVAC app with Alexa and Google Assistant.
- Quiet indoor unit: Runs at 25 to 40 dB(A).
- Six modes: Auto, Cool, Dry, Heat, Fan and Sleep.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | MrCool |
| Series | Olympus Energy Star |
| Part number | O-ES-12-HP-230E |
| Type | Single-zone ductless mini split heat pump |
| Capacity | 12,000 BTU cooling and heating, 1 ton |
| Coverage | Up to about 500 sq ft |
| Efficiency | 22.7 SEER, 13.7 EER, 11 HSPF |
| Low ambient heating | Down to -13 F |
| Power | 230V, 60Hz |
| Indoor noise | 25 to 40 dB(A) |
| Line set | 25 ft included, 82 ft maximum run |
| Controls | Remote, SmartHVAC WiFi, Alexa, Google Assistant |
| Installation | HVAC technician |
| Warranty | 7-year compressor, 5-year parts, 1-year remote with registration and professional install |