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Bertie_Woo t1_irnjqyk wrote

Reply to comment by ZweitenMal in Your annual reminder that if your apartment has a radiator, don't open and close the valve. This can create condensation in the system causing a knocking sound. Radiators are designed to be used with a series of open windows to balance heat. by emeyer94

This is just an excuse. Opening your windows is wasteful and drying.

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