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A comment on Pretty Good House. Parent comment
Article in Polish, but worth translating or just looking at the photos: https://www.money.pl/gospodarka/w-tym-miescie-nie-martwia-si...
Shortly: insulation, new windows, solar panels, heat pumps (heating + warm water).
They do not show "before" photos, but I found some similar building before renovation on the same street: https://www.google.com/maps/@51.3586963,21.5793371,3a,75y,16...
They mention 90% savings in heating costs, which apparently pays off the debt they had to take to make the upgrades.
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Article in Polish, but worth translating or just looking at the photos: https://www.money.pl/gospodarka/w-tym-miescie-nie-martwia-si...
Shortly: insulation, new windows, solar panels, heat pumps (heating + warm water).
They do not show "before" photos, but I found some similar building before renovation on the same street: https://www.google.com/maps/@51.3586963,21.5793371,3a,75y,16...
They mention 90% savings in heating costs, which apparently pays off the debt they had to take to make the upgrades.