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GPM flow rate thrugh cast iron radiators
will be installing a Triangle Tube PE110 Prestige Excellence nat gas boiler in a older home that has cast iron radiators first and second floor.
will be piping it primary secondary will be taking out large 2" black supply and return and using a radiant manifold and doing a home run of 1/2" VIEGA fostapex pipe direct to each radiator.
first off the manifold will be the 6 second floor radiators and then the 4 first floor radiators with the radiator closest to the thermostat last.
The manifold will have flow gauges on them and I will be able to balance each radiator so they all get hot at the same time. On the header the max flow GPM to each radiator will be 2 GPM will that be enough to make the radiators heat up and give off enough heat?