That time of the night, low temp alarms from my home server room. Furnace will kick on at 6am so it's semi warm when I get home, but since I go to bed it only runs long enough to take the edge off.
Seems to have warmed up outside though!
Living Room 11.6875°C (-)
Hallway 14.25°C (-)
Server Room 13.9375°C (=)
HVAC Return 11.1875°C (=)
HVAC Supply 11.8125°C (=)
Outside -16.3125°C (-)
... or maybe not, weather site says -27. My sensor seems to not be too accurate when it gets cold. Though it may actually be thermal losses of the house that's affecting it too. I'd have to wire it so it's further outside instead of right against the house.