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If Europe has started experiencing over 40°C heatwaves frequently, then this planet really is fucked
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this post was submitted on 06 Jul 2026
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That’s not how insulation works
Yes because modern Scandinavian homes have huge uncovered well insulated windows to allow the sun in as a free radiator during winter. I calculated my living room window to be somewhere between 3000W-5000W worth of radiation. Due to the high insulation this doesn't dissipate during the night in a heatwave, so it doesn't matter if the outside temp is 18°
Why? Because housing regulations dictated it. No one expected 2018 levels of heatwaves to be the new norm (except all the experts).
My old apartment reached temps of 35° measured at midnight for weeks in the 2018 heatwave despite the outdoor temp not rising much above 30°. Morning temps where around 28° with all windows open. If the morning baseline was lower the night temps might have been possible to sleep in but the insulation kept temps high throughout.
Works perfectly when it's still 35°c in the middle of the night 👍🏻