55°... but that's because everyone is gone and we had to set it as low as possible without pipes freezing. We normally keep it around 62°. Seems cold, but out of 4 people, we are rarely home due to school so its turned to 62 most of the day and night, and no one hangs out downstairs (all bedrooms are 2nd or 3rd floor) even when home, so if its ~62 downstairs, its a couple degrees warmer on 2nd floor, and even warmer on 3rd floor, plus we have computers to keep us toasty. And finally, we just wear a swearshirt or whatever. I mean it's Houghton, Michigan, no way in hell is it feasible to have the downstairs a toasty 70° all winter. Ah, poor college students!