This little heater has truly impressed me. Cranks out the heat like I couldn't believe. It's going in a small overland trailer but I have been using in the garage right now to test it. 22'x22' garage, -5 to -10 celius outside and the heater warmed the garage to the point I could work in a t-shirt and be quite comfortable. It has been working hard to do it, but hasn't failed me yet. Directions suck but if your slightly mechanically inclined you'll figure it out. You tube is great for figuring the control panel tricks as well.