Right out of the box the thermostat was stuck on 72, I left it plugged in for hours on the lowest setting 60 with the outside temp of 34. Finally to take the chill out of the air I set it to max 1500 / 80 degrees. Not accurate at all, it shut off after 5 minutes had to sit right next to the heater to feel it. The metal seams do not line up as in not flush sticking up.