Answer
Mar 10, 2026 - 02:13 PM
To determine the BTU needed for a pool heater, calculate the pool’s surface area (length × width), multiply by the temperature rise desired (in °F), then multiply by 12. Use the formula: BTU/hr = Pool Surface Area (ft²) × Temperature Rise (°F) × 12. This gives you the approximate BTU per hour required to heat your pool efficiently.
