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.3 gpm on hydronic heating -- help
I have an IBC boiler HC33-160 connected to a 4 loop EP manifold; each loop is about 250' of 1/2" hepex in joisttrak spaced 8" apart, with insulation beneath it and plywood subfloor and wood flooring above.
Pump is a UPS15-58.
The house is poorly insulated.
I can't get the house to rise above 68* even with the radiant system running almost always.
I can feel the loops and they're nice and warm.
I put additional temp gauges on the copper in and out to the manifold, because I didn't trust the ep manifold's built in temp gauges. In is at 125, out is about 110.
Pump is set to high, but the flow rate, as indicated by the manifold's flow meters, never gets above .3 gpm. I have quadruple checked that the manifold flow valves are open all the way.
Is my problem the flow rate? If so, do I have an undersized pump or is something else going on?
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