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Author Topic: heat exchangers in series  (Read 7410 times)

WB Guy

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Re: heat exchangers in series
« Reply #15 on: May 03, 2015, 07:43:01 PM »
How many zones in the house? What size piping on the exchanger? 1or 1 1/4? A 60plate will come with 1 1/4 piping. 2 or 3 zones on 1in is ok but more will reduce the flow thru the exchanger not allowing enough gpm to the zones. Most baseboard requires 3gpm minimum. So if 3 zones are running it is trying to push 9 gpm thru the plate. You can pipe 2 BPHX in parallel to increase the flow, so both get the hot supply and there is no temp decrease by being in series and the 0011 will give you enough gpm from the woodboiler to keep up with zones. Or you could use a tube and shell style exchanger for pools with 1 1/2 piping and have high gpm thru the exchanger. I used one on a church with 8 zones and 2in piping and it worked great. It was 500,000 btu you may not need one that big but it is an option.
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