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Expansion tank for hot water loop off steam boiler?
I am adding a hot water loop to my steam boiler for an indirect water heater with future capacity for additional hydronic zones. When run off a hot water boiler this would require an expansion tank, but does it if it’s a steam boiler and therefore open to the atmosphere?
Homeowner from Providence, RI
Home b. 1897, one-pipe steam with a indirect gravity hot air system using Gold's pin radiators.