The most efficient PTAC at its size here, for rooms used most of the year where running cost matters. Register it for the compressor warranty.
Amazon $1,149
The cheapest way into a standard sleeve, for a room that mostly needs cooling. The one year warranty and strip heat make it a short-term buy.
- 9,000 BTUCooling
- Electric heatHeat
- 1 yearWarranty
Price checked November 3, 2026. As an Amazon Associate we earn from qualifying purchases.
- The lowest price at its size
- WiFi smart kit and remote come in the box
- Heats with the electric strip only, which costs far more to run than a heat pump
- One year warranty, the shortest here
- OLMO publishes no EER, so cooling cost is unknown
The OLMO PTAC family
Every OLMO PTAC model we rank, smallest first. Ratings compare each against its own size.
| Model | Cooling | Rating | Price |
|---|---|---|---|
| OLMO 9,000 BTU PTAC (this one) | 9,000 BTU | 3.2/5 | $739.97 |
| OLMO 12,000 BTU PTAC | 12,000 BTU | 3.2/5 | $829.97 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | OS-MBW-09HS |
|---|---|
| Cooling | |
| Cooling at 230V | 9,000 BTU |
| Federal minimum EER | 11.3 |
| Inverter compressor | No |
| Refrigerant | R-32 |
| Heating | |
| Heat type | Electric heat |
| Electric heater | 3.5 kW |
| Controls and install | |
| Phone app | Yes |
| Remote included | Yes |
| Sleeve and grille included | No |
| Voltage | 208/230 V |
| Warranty | 1 year |
Alternatives in this size
A cheap heat pump PTAC with a remote and a long compressor warranty. Register it online, since the parts cover is short.
Amazon $799A cheap heat pump PTAC with a remote and a long compressor warranty. Register it online, since the parts cover is short.
Amazon $849Compare
Compare the OLMO 9,000 BTU PTAC with any other PTAC unit →
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