This combo AC/Heater unit is an easy to use, and easy to handle, solution to maintaining room temperature when a main-source heat and air solution is not accessible. The unit is not real heavy, so is easy to get in and out of the siding cutout where it resides in our house. It is in our patio room where our dogs spend much of their day when it is cold or hot outside. The AC function is more than adequate to cool the 260 sq ft room. The heating function is adequate for most "normal" winter days. It needs some other help when temps stay below 30 with no sun. But it does enough to keep the dogs comfy and the plants in the room alive. It would be an ideal machine if the heater was a bit more forceful. But it is a very good unit.