Pool Heater Size Calculator

This calculator determines the BTU output required for your pool heater based on volume, temperature rise, and heating time.

Formula Used:

BTU Required = (Pool Volume x 8.33 x Temperature Rise) / Time / Efficiency x 1.15

Heater Types & Efficiency:

• • Natural Gas: 80% efficiency
• • Propane: 80% efficiency
• • Electric: 95% efficiency
• • Heat Pump: 75% efficiency (COP factor)

Sizing Guidelines:

• • Small pools: 100K-200K BTU
• • Medium pools: 200K-300K BTU
• • Large pools: 300K-400K BTU
• • Commercial pools: 400K+ BTU

Factors Affecting Heating:

• • Pool surface area (heat loss)
• • Wind exposure
• • Pool cover usage
• • Ambient air temperature
• • Altitude and humidity

Energy Saving Tips:

• • Use a pool cover when not in use
• • Install windbreaks around pool
• • Heat pump for mild climates
• • Solar heating for warm regions
• • Lower temperature when away

Operating Costs (per hour):

• • Natural gas: $3-8
• • Propane: $8-15
• • Electric: $5-12
• • Heat pump: $2-6