Edit: my wife controls the thermostat in the room. I’ve been turning the heat on when I wake up, but she keeps turning it off. It’s actually 58.3F in the BR right now, since we just showered and the dehumidifier has been running. /edit
I recently installed mattress heating pads and turned the heat off. Both rooms got down to the mid-50s. The queen size has two sets of coils with independent controllers. My wife turned her side down to 6 out of 10; I woke up this morning and had forgotten I had it on 5 and was uncomfortably warm. I think 2-3 will work for me. One of my kids turned his down to 5, as well because he was two warm. The other is more like me and I came in a couple of times to check and the covers were thrown off. Kept doing that eventually after tucking her back in.
My wife worried that her face would get cold during the night, and she always had cold feet. She said this morning that her feat were warm and didn’t complain about being cold at all.
So, it’s been 35-40F outside and for the past couple of days the heat in the entire house has stayed off, except for a space heater in one bathroom for when we shower. It’s in the low to mid 50s upstairs and right around 50 in the basement. Im sitting here on the couch in pants and a hoody and I wear slippers due to the wood floors being heat sinks. My young kids still run around barely dressed and I have to demand that they put some socks on, at least.
The main rooms and bedroom face south, so the doors, windows and skylights add a lot of heat on sunny days.The incandescent lights on the ceiling fans also add a tiny bit of heat, as do the TVs and such. I do also run dehumidifiers 24/7 to keep the RH < 50%, so that adds some heat. With the lower temps they run a lot more, but we also minimize HUMidifier usage that is usually required here with cold outside temps and warm inside temps.