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A comment on The humble water heater could be the savior of our energy infrastructure woes. Parent comment
This is how your thermos knows wether to keep your drink hot or cold.
So except for the sun shining through windows, insulation keeps heat out of your house.
This is how your thermos knows wether to keep your drink hot or cold.
So except for the sun shining through windows, insulation keeps heat out of your house.