1. What is Pool Heater Size Calculator?

Definition: This calculator determines the BTU (British Thermal Unit) requirement for a pool heater based on water mass, temperature change, and heat loss factors.

Purpose: It helps pool owners and professionals select the appropriately sized heater for their swimming pool.

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 of water (1.0 BTU/lb·°F)
• \( \Delta T \) — Desired temperature increase (°F)
• \( Q_{latent} \) — Additional heat for evaporation/wind loss (BTU)

Explanation: The formula calculates both the sensible heat (temperature change) and latent heat (evaporation/wind loss) requirements.

3. Importance of Proper Heater Sizing

Details: Correct heater sizing ensures efficient operation, proper temperature maintenance, and avoids unnecessary energy costs.

4. Using the Calculator

Tips: Enter the pool water mass in pounds, specific heat (default 1.0 for water), desired temperature increase, and any additional latent heat requirements.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate pool water mass?
A: Multiply pool volume (gallons) by 8.34 (weight of 1 gallon of water). For example: 10,000 gal × 8.34 = 83,400 lb.

Q2: What's a typical temperature increase?
A: Most pools aim for a 20-30°F increase from the source water temperature to the desired swimming temperature.

Q3: What is latent heat in pool heating?
A: Additional heat needed to account for evaporation and wind cooling. Typically 10-20% of sensible heat requirement.

Q4: How does pool size affect heater requirements?
A: Larger pools require more BTUs to heat the same temperature increase. The relationship is directly proportional.

Q5: Should I round up my heater size?
A: Yes, it's recommended to add 10-20% to the calculated BTU for safety margin and faster heat-up times.