Pool heating cost is pump kWh plus grid kWh to replace heat lost to evaporation—not just the heater sticker. This guide walks through the pool heating cost calculator: pump power, run hours, electricity rate, heating method, COP, and optional thermal cover savings.
Benefits
- Separates pump energy from heating energy so you see what the heater actually costs.
- Compares resistance (COP 1) vs. heat pump (COP 4–6) on the same thermal load.
- Models thermal cover savings on heat demand—typical 30–50% less evaporation loss.
How it works
- Enter pool pump kW, daily run hours, and your $/kWh electricity rate.
- Choose electric resistance or heat pump heating and set COP for the heat pump case.
- Toggle thermal cover and pick a savings % to see daily cost and annual heating savings.
FAQ
How do I calculate pool heating cost?
Daily heating grid kWh ≈ heat demand ÷ COP. Resistance COP = 1; heat pumps often COP 4–6. Add pump kWh = pump kW × hours/day. Daily cost = (pump kWh + heating kWh) × $/kWh. Example: 12 kWh thermal load, COP 5 heat pump → 2.4 kWh heating + 12 kWh pump at 1.5 kW × 8 h → 14.4 kWh/day × $0.14 ≈ $2.02/day.
Heat pump vs. electric resistance for pool heating?
Resistance delivers 1 kWh of heat per kWh of electricity. A heat pump moves heat from ambient air into the water, so the same comfort often needs 4–6× less grid energy. The calculator shows monthly heating cost for both methods on the same load so you can see dollars saved switching to a heat pump.
Does a thermal cover reduce pool heating cost?
Yes—covers cut evaporation, which is the largest heat loss on many outdoor pools. Savings apply to thermal load, not pump kWh. Typical blankets save 30–50% on heat demand; enter your cover type in the calculator to see annual $ saved alongside heating technology choices.
Technical specifications
- Daily pump kWh = pump_kW × hours/day.
- Heating grid kWh = heat_demand_kWh ÷ COP (1 for resistance, 4–6 for heat pumps).
- Cover reduces heat demand by selected % before COP is applied.
- Related: pool-energy-thermal-cover, heat-pump-vs-resistance, ac-inverter-savings.