Relation between pump size and water velocity

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Babu

Member
Feb 17, 2015
5
Rochester
I'm heating a 23 ft by 19 ft shop with a 20 ft celing. My heat loss calculation shows about 30,000 btu/hr. I have 64ft of 3/4"copper baseboard heaters rated for of a total of 37760 btu @ 180 F. I'm showing based off the
"Taco Radiant Made Easy Application Guide" this requires about 3.9 gpm at a 20 F drop and I should keep the velocity between 2 ft/s to 4 ft/s.

The 2 pipe coming into the shop total 40 ft of 1" oxygen barrier pex and there are lines, fitting etc connecting the baseboards. Let's say I have a head loss of 5 ft and already have a taco 007 pump. At a 5 ft head loss the graph shows the pump will push about 16 gpm.

Will the Taco 007 pump increase the velocity to beyond 4 ft/s?
 
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