How to use the Pool Energy Cost & Thermal Cover Savings Calculator
The Formula
Pump kWh = kW × hours. Heat demand to offset evaporation is modeled from that load; grid kWh for heating = heat demand ÷ COP (1 for resistance, 4–6 for heat pumps). Covers reduce heat demand before COP is applied.
Practical Example
Resistance heaters deliver 1 kWh of heat per kWh of electricity. Heat pumps move heat from ambient air into the water, so the same comfort often needs 4–6× less grid energy.
About Pool Energy Cost & Thermal Cover Savings Calculator
What we model
Pump kWh = kW × hours. Heat demand to offset evaporation is modeled from that load; grid kWh for heating = heat demand ÷ COP (1 for resistance, 4–6 for heat pumps). Covers reduce heat demand before COP is applied.
Heat pump vs. resistance
Resistance heaters deliver 1 kWh of heat per kWh of electricity. Heat pumps move heat from ambient air into the water, so the same comfort often needs 4–6× less grid energy.
Frequently asked questions
Q: Gas heater? A: Enter an equivalent $/kWh or use resistance as a conservative electric baseline. Q: Cover %? A: Match your blanket type (30–50%). Q: Home AC? A: See AC inverter savings for related cooling efficiency.