This is a very well made heater. I installed this behind the seat in my single cab truck ( in retrospec the 8 kw was a little overkill) the outer plastic shell on the unit itself remains cool to the touch, but man does this thing crank out some heat! Very fuel efficient, about 20-30 hours on a single tank of d-2. The glow plug draws about 10 amps on start up, then drops to just over an amp while running. I would definitely recommend this/ and will probly buy another one