How to calculate GPM or TDH for a Coil or Chiller

Measuring flow (GPM) across a new coil or Chiller is easy with this formula which compares the Actual Pressure Drop against the Rated Pressure Drop to determine the Actual GPM

Calculating GPM is simplified using this formula.

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@VRFWizard

[NROhvac]

Thank you for this. Would this be a good tool to use for any chiller I walk up to old or new to calculate flow rate?

[nanthakumarseenivasan]

Thankyou for this, I have one doubt chiller Flow (GPM) depends on primary pump, If this pressure drop get reduced means GPM will increased increased right

[JERKER]

Can you use this for pumps as well or is it different?