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mule_roany_mare t1_irmkapx wrote

Reply to comment by PuzzleheadedWalrus71 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

If you don’t want to close the valve on your steam radiator see if the owner will install a TRV, Con Ed gives them out free/cheap & it’s a 5 minute install.

They go where the air valve is now & work the same way, except they have a wax seal that closes when the room is too warm. After a cycle or two when the radiator can’t vent the air it will keep most of the steam from entering.

If some villain noticed it was too hot & put a piece of electrical tape over the vent it would keep 90% of the steam from entering.

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