I'm using this heater in my single car garage workshop to take the chill out (from 30-40 degree range) and maintain a comfortable working temperature. This is a small and easy to handle unit but it gets me to a desirable temp within 10 minutes or so. As there is not a dedicated on /off switch, I unplug the unit when not in use. Require a 30 amp circuit with a 6-30 plug. The unit is well priced and arrived in perfect condition within a few days of ordering. This heater meets my expectations