For years I did this with the thermostat - something I learned from my father who always kept the house under 65F (18C) in Winter. I'm somewhat ashamed to admit it even led to arguments with my spouse early in our marriage when I would enter a room and find the thermostat set to a balmy 70F.

Eventually I just sat down, looked at how much it costs keep the house a few degrees warmer in winter, and realized we could afford to be comfortable. And if I were really hell bent on saving money, there were other lower-priority expenses I could cut back on first. But I don't even think it was even necessarily about the money - it was more that saving energy and toughing it out felt virtuous to me. Which is all fine, but not something that should be imposed on your partner if they don't share the same beliefs (or if they just get cold easier than you).

Funny, I went the other way round in the Bay Area. PG&E bills were so high so it was the choice of putting on a jacket or paying $1k extra over the winter months. And my reasoning was "I can afford a jacket".

I love the winter for this. My thermostat is set to 16C at night. I prefer if the heat never even kicks on, it’s noisy and disruptive to have air blowing through the vents. I wish there was AC that could make my house that cold at night while making no noise!

Going on your Slavic username: as an American who moved to a country without forced-air HVAC, it’s been quite a revelation to discover how backwards forced air really is.

Air heat pump? I don’t notice the sound.

I’m always colder in my mother’s house in Scotland (-5°C on cold days) than I am at my MIL’s house in the frozen Canadian wastelands (-40°C/F on cold days), because my mother will play games with thermostat to save money, where my MIL would simply die of exposure if the heating wasn’t on consistently for 6 months of the year.

There's also a very different type of cold close to the water. -40C will dry out your skin and make it feel like it's burning, but -5C in Scotland or on one of the Gulf Islands near Vancouver will make your bones feel frozen without good insulation.

You know those Christmas cards that show a frosty twinkly white treescape? That climate will kill you even at -5C.

People die on Ben Nevis every few years because they think its not that cold. But Scottish cold in that part of the world is brutal, there's so much moisture in the air that freezes if you get wet and cant quickly get dry you will die fast.

Still, it's a beautiful part of the country.

If the relative humidity is 100%, then being wet won't make you colder: the water has to evaporate in order to cool you, and it can't do that at 100% relative humidity. The problem that high humidity cold causes is increased convection, and the problem being wet causes is the dramatic near-complete loss of the insulation value of many garments.

There is a _lot_ of folk science about cold weather that is just plain wrong.

> The problem that high humidity cold causes is increased convection

Can you help me understand? How does higher relative humidity increase convection?

Humid air has higher heat capacity and higher heat conductivity than dry air which both increase convective heat loss.