It's snowing and cold outside, but my Antminer S9's are still keeping my house nice and warm. I did this all last winter and I'm doing it again this winter. It works so damn well. I have one in the basement, where I am now, and two on the first floor. The second floor bedrooms are probably a degree or two colder than the rest of the house, but no one complains. The house stays between 68 and 72 degrees throughout the night and day. Bitcoin heat is the best kind of heat. Change my mind.