That is a horrible idea. Then you’d need to deal with warm water when you’re trying to chill, and having to actively cool to keep your fermentation temperatures in check.[/quote]
I’ve only been to Finnland in the winter (early January and late June), so I can see that it would be a lot easier to chill wort and ferment cool. But, don’t you have to heat the fermenter unless your doing all your lager fermentations during July?[/quote]
You should try to visit in the summer. The Finnish summer is very beautiful. Short but very very beautiful. Last year it happened on a Tuesday.
The houses here a too well insulated and kept too warm to ferment inside, so I built a Styrofoam fermentation chamber in my outside shed, which allows me to do precisely controlled fermentations 9 months a year only using heat. That leaves a couple months (mid June to mid August) where it is generally too warm to make beer without active cooling, so I take off then.