I purchased this portable unit to heat my 650sq' workshop in the upper level of my garage. The space is insulated and dry walled. The unit heats up the space in about 15 minutes and the thermostat feature maintains temperature beautifully. There is a fan in the unit that is noticeable, but not a nuisance. Quiet music playing easily covers the fan sound. I had read the 6' cord restricted some users, so I wired my receptacle about midway in one of the knee-walls. Now I have many possibilities to position the unit, although any position heats the entire space evenly. Now, I am wiring a second outlet for the main garage floor, so I can move the unit there if I ever need some temporary heat down there,