Homelab

Yup, mine is around 18-19 in Canada, 25 is wayyyy too hot

Maybe energy is cheap there or OP is rich, I live in the UK and was surprised by the temperatures they quoted.

I would say though that Scandinavian houses are known for being very well insulated and energy efficient.

My heating is on 19C when I'm home, lowered to 10 while I'm out/sleeping because my cat has his own fur coat to keep him warm and I have a 13 tog duvet

I had the exact same thought... our heat is set to 20 most of the time. 25 would be hot!

I’m about 21-22 year round (also in Canada) and my server room isn’t much warmer than the rest of the house but it isn’t closed off either. The larger air space you can give it, the better.

TL;DR: No - I think across the Europe 19° to 21° is common during winter. Less than 19° if you're trying to save money and have old house (and here homes might actually go decades if not centuries older) with crap isolation; and maybe up to 22° if you have kids/baby and have good isolation.

The majority of Dutch keep it at ~19° during winter because of cost of gas/electricity. And then so far majority kind of hoped global warming isn't a thing. So during summers 25-30° (if not higher) also started to be a thing inside homes for those folks that don't have airco and have computer on their attic/zolder. And that's with shades/roll-blinds mostly down yet windows are open 24/7 so it circulates and cools off during night ...etc.

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These days (actually almost last decade or so) the "joke" is that getting a house just about anywhere in The Netherlands is great investment because within just a few decades you'll [likely] have a tropical house next to a beach.

No wonder that pre-teenager kids need to pass a swimming lessons/certificate where test is basically "clothes and footwear" (they allow thinner jacket & sweater, borderline pajamas for pants and I guess no need for "Canadian Boots" and sneakers are fine) - where you're pushed with your back into the pool, and then you need to swim under some obstacles (floating platform), and through some hole in a plane/flag, and pull yourself out of the pool.

BTW I'm originally from Balkans - Belgrade/Serbia where "European continental" climate is, or at least was a thing when I was growing up. I would think Toronto and New York are very similar.

So at least 30° Celsius outside during summer (now regularly even more and sometimes closer or above the 40°C), and quite a few weeks/years where in just a few hours we went from 0cm to 50cm or more of snow, causing total transport collapse - which meant no school ;)

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Anyway biggest issue for me during summer here in Amsterdam/NL (which is still below summer heat I grew up with in Belgrade/Serbia in terms of ° Celsius) - is the humidity.

Calculation/story wife and I (and family that came to visit us for extended period here in NL) have is basically:

- around 0°C and the Dutch are hopeless. I mean country is flat, yet cars and even trucks/lorries get stuck - obviously because many use summer tires, though also they just don't know what to do (e.g. shovel, sand/salt, rubber floor-mat) even when they have all-season/universal tires that people can go to mountain without snow chains
- 10°C or less outside might require a bit thicker pullover/sweater or even windbreaker jacket, and if it's <=5°, windy and sun isn't strong enough - I might feel like Timberland Pro, North Face parka jacket
- And yet 25°C or more outside might require you to wear short pants, t-shirt, flip-flops and hide from the sun or else you might get a heat stroke

Also Canada and I keep mine closer to 24-25c. 19-20 waa what my parents used to do growing up lol.