Case Study: Converting Two-Pipe Steam To Hydronic Heating

New York City is filled with multi-family apartment buildings built before World War II; we often refer to them as prewar buildings. Of course, many wars have been waged since 1945, so I won’t use “prewar” as a description. A common trait of these buildings, however, is that they are heated with steam boilers. Builders didn’t stop building multifamily housing with steam heat after the war—steam heat has been as common as hot-water heat in these large buildings for some time...

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