Question for Dan and others

DanHolohan

I'd use a B&G System Syzer.

Tim_31

Pump sizing

Dan

Is the Radpad something that can be used to size pumps for radiant floor heating systems?
Is the a better way to do it?

hr

Yes

the B side will give you the data to size the pump. Then refer to a pump manufactures "pump curves" to select the pump that fits the specs.

In this example I used a .7 gpm for the loop. At a 300 foot length of 1/2" pex that would be a tad over 5 feet of head. 10 loops at .7 gpm per loop would require a 7gpm flow at 5 feet of head.

Radiant design software will give you all this info also. In addition, it will give you supply temperature, delta T and fluid correction multipliers.

The Grundfos Super Brute on speed 2 would be a good pump choice, for the above example. If you had fewer loops (less gpm requirement) then speed 1 may be a perfect match.

hot rod

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Tim_31

Thanks

Thanks for pointing me in the right direction.

bob_50

Tim

you can download a software version of the B&G System Syzer at B&G's web site