Circulator Swap to Zone Valve?

Cyclist77

As I plan for a new boiler for our radiant heat system I was wondering about this idea. Since it is piped Primary/Secondary with a circulator for each zone. Would there be any benefit, energy savings, to change out the circulators to zone valves?

EdTheHeaterMan

That depends. the savings will not be in the fuel efficiency of the burner. The savings might be in the amount of electricity you use. Zone valves use less electric than regular pumps do.

Will one pump handle the GPM of all sones calling at once? The original designer may have calculated that one pimp for each zone using smaller pumps was better than having a larger pump operating if only one zone valve was open.

OR

The original designer did not like zone valves and only used pumps for zoning making some systems have way too much pump capacity for the system. There is mathematics involved in the answer to your question.

With the new ECM pumps, sometimes zone valves are a better fit because the pump can self adjust to smaller and larger gallon per minute requirements of a zone valve system

hot_rod

you may need to repipe to get all circuits to a single connection, you can’t just swap a zone valve for a pump

I thought you were going with a cast boiler, 4 way mix valve? You should not need P/S