Energy Code Ace - JA16.3 Heat Pump Pool Heater Sizing

2025 Reference Ace

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JA16.3 Heat Pump Pool Heater Sizing

A heat pump pool heater (HPPH) shall be sized using the HPPH manufacturer’s specifications. The following sizing provisions shall be applicable if the HPPH manufacturer’s specifications do not include information on HPPH sizing:

Determine desired pool temperature in °F.

Determine average temperature for the coldest month of pool use in °F.

Determine temperature rise in °F by subtracting the average temperature for the coldest month from the desired pool temperature.

Calculate the pool volume in gallons.

Calculate the time needed for the HPPH to achieve the 10 °F degree rise in hours. This shall not exceed 17.5 hours.

Use Equation JA16-1 to determine the Btu/h output requirement of the HPPH.

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