Circulator Pump Calculator

Find the right pump for your outdoor wood boiler system

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Delta T Helper

Answer 3 questions to find the right ΔT for your wood boiler system.

1 What type of heat emitters does your system use?
2 What size PEX pipe does your system use?

Pipe size directly affects water velocity. Smaller pipe moves the same flow through a narrower opening, raising velocity. A higher ΔT reduces the required flow rate (GPM), which lowers velocity and keeps your system within safe limits.

3 Are you heating domestic hot water (DHW)?

Wood boilers commonly heat domestic hot water through a heat exchanger. The exchanger type affects how aggressively the boiler loop must shed heat per pass, which influences the optimal ΔT.

Recommended Delta T
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Wood Boilers For Harsh Midwest Winters