Lmao, I should check. It's a small condo. Must be a combination of good insulation, electronics and lights giving off heat in a small space and they crank the heat up pretty high in the building so heat comes in through my door from the hallway. Other thing could be because my water heater is in a small closet inside my condo. But hey I'm not complaining, my heating bill last month was like $8 lol, guessing for the hot water from the water heater that I use.