Pool Heater Sizing Calculator
Heater kW to raise pool temperature in a chosen time, plus surface-loss top-up.
Evaporation is 70% of pool heat loss — a ₹5,000 cover outperforms kilowatts of heater. Heat pumps at COP 5 own this duty in mild climates.
Formula
Pool Heater Sizing Calculator is a free pool heater size for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Pool Heater Sizing Calculator
Heater kW to raise pool temperature in a chosen time, plus surface-loss top-up. The calculation implements P = m·c_p·ΔT/t + surface losses (0.1–0.25 kW/m²) (ASHRAE Applications — swimming pools). Evaporation is 70% of pool heat loss — a ₹5,000 cover outperforms kilowatts of heater. Heat pumps at COP 5 own this duty in mild climates.
How to use Pool Heater Sizing Calculator
- 1Enter Pool volume in m³.
- 2Enter Temperature rise wanted in °C.
- 3Enter Heat-up time in h.
- 4Enter Pool surface area in m².
- 5Read Heat-up power, Maintenance (losses) instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pool Heater Sizing Calculator?
- ✓Implements the standard formula — P = m·c_p·ΔT/t + surface losses (0.1–0.25 kW/m²)
- ✓Reference cited on-page: ASHRAE Applications — swimming pools
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Pool Heater Sizing Calculator use?+
It computes P = m·c_p·ΔT/t + surface losses (0.1–0.25 kW/m²), per ASHRAE Applications — swimming pools. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Evaporation is 70% of pool heat loss — a ₹5,000 cover outperforms kilowatts of heater. Heat pumps at COP 5 own this duty in mild climates.
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the Pool Heater Sizing Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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