I purchased this heater a year ago, and had it installedin in my 23'x14' workshop. this fall when the temp hit 62 I set the thermostat there I haven't had to touch since. this heater keeps my semi insulated workshop at a very comfortable temp. for working our winter here in central Pa. has been a doozy' and i have no complaints. great heater for a great price. I definitly recommend this unit for any garage workhop you will not be dissappointed!