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mule_roany_mare t1_irlbxka wrote

Reply to comment by uniqualykerd 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

I think 2 pipe steam is more common in the EU one pipe lets steam in, one pipe lets water out. NYC has a lot of one pipe steam.

There are enough ways to deliver heat to a radiator it's impossible to make comparisons without knowing which is which.

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