this post was submitted on 12 Sep 2023
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Technology

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[–] schnokobaer@feddit.de 2 points 1 year ago

gas furnance that was somehow under-dimensioned – the idea is that in the real cold days you’d still have the good ole fireplace

Oddly enough I've never encountered that in Germany, I only ever see catastrophically oversized furnaces that start cycling in March... Seems to me plumbers never really worry too much about correct dimensioning, they just put the same 20 kW furnace that they know and love to install in every apartment and single family home. For some it will be somewhat adequate, for some it'll be oversized, who cares, customers never complain when the furnace cycles, but when it's too cold, you've got a problem. Same as they're never too worried about finding suitable supply water temps. Just set it to 80 and you're good, it's the customer who pays horrendous gas bills, not you lmao. That's also why everyone thinks their Altbau has to have 80°+ supply water when they have never really tried anything lower to see if it maybe suffices. My parents had their oil-furnace on 80C supply for the past 40 years and last winter when everybody was trying to save as much energy as possible they figured out you can set it to 55 as well.