haha for the closet grower dont even think about this, ur paranoid. If u got vents blasting out hot air like over 1000cfm Then um sure u should worry, with temps at 80 degrees in the winter u would def show up on the radar. Im sure this is the new #1 way for cops to bust now and days. Just think about your dryer for your clothing. that disipates a good amount of heat from your house, but its not enough to ask a question.