I bought this heater for a 24' x 24' garage that we have almost finished building. The size of the unit is deceiving (truth be told I was skeptical when it arrived) but once we installed our ceiling this heater was able to raise the interior temperature to sixty degrees while it was only in the high teens outside. The construction is all steel and has a very solid feel. The fan unit is quiet compared to a forced air furnace and the adjustable heat control knob works as a thermostat (shutting off the unit when it raises the temperature to the allotted setting). Overall a perfect little heater and a great value for the money. Highly recommended by this buyer.