18C . We live in a condo building that is well insulated so setting it any lower wouldn’t help. I agree, it’s preferable to sleep when it’s cooler. 24C in winter is insane - if you’re cold just put on a jersey or a fleece.

If I set my winter evening thermostat to 14C my wife would have my head on a spike in the front lawn. Police be damned.

We keep it at 22C as a compromise during the day and 19 at night (since we sleep better in the cold).

I keep 18.5°C during the day in the floor I work (fully remote so I’m sitting at the desk all day long) and off at night

24C, that’s insane!

During winter we try to keep the daytime temperature around 20-21C in the rooms we use the most, and a couple of degrees cooler in other rooms. We find it important to not have a too large temperature difference between rooms in order to avoid mold growing.

During nighttime we set the thermostats to 16-17C.

We have our thermostat set to 63°F in the winter. We’ll go up to 67°F or so if there’s a storm bad enough that power loss is possible.

In the summer, we have our air conditioners set to 70°F.

In the winter, I’ll accept 23C anything colder and I catch a cold.

I live offgrid in a campervan and do not have HVAC in the normal sense. I follow mild weather, aiming for daily highs of 65-70deg F. Because I camp in arid regions this usually means overnight lows of 35-45F. I try to avoid overnight freezes for comfort and to protect my water system.

My roof vent is set to 65F (comes on then and tries to hold that temp). The LiFePO4 battery bank is warmed to 50F. At night I use an electric blanket and dogbuddy to stay warm if needed.