1. What is a Pool Heater Size Calculator?

Definition: This calculator determines the BTU size required for a pool heater, accounting for water mass, temperature rise, and evaporation losses.

Purpose: It helps pool owners and professionals properly size a heater to efficiently maintain desired water temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total heat required (BTU)
• \( m \) — Mass of water (pounds)
• \( c \) — Specific heat capacity of water (1.0 BTU/lb·°F)
• \( \Delta T \) — Desired temperature rise (°F)
• \( Q_{latent} \) — Additional heat for evaporation losses (BTU)

Explanation: The formula calculates both sensible heat (temperature change) and latent heat (evaporation losses) to determine total heating requirements.

3. Importance of Proper Heater Sizing

Details: Correct sizing ensures efficient operation, prevents energy waste, and maintains comfortable water temperatures.

4. Using the Calculator

Tips: Enter water mass in pounds, specific heat (default 1.0 BTU/lb·°F), desired temperature rise, and any additional latent heat requirements.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate water mass?
A: Multiply pool volume (gallons) by 8.34 (weight of 1 gallon of water).

Q2: What's a typical temperature rise?
A: For outdoor pools, 20-30°F is common. Indoor pools may need less.

Q3: How do I estimate latent heat loss?
A: For outdoor pools, add 10-20% of sensible heat. Use 0 for indoor pools with covers.

Q4: Should I round up the calculated size?
A: Yes, always round up to the nearest available heater size for safety margin.

Q5: Does this account for heat loss through walls?
A: No, for significant heat loss through walls/floor, increase latent heat value.