1. What is an Electric Pool Heater Calculator?

Definition: This calculator determines the required heater capacity (in kW) needed to heat a pool to the desired temperature within a specified time.

Purpose: It helps pool owners and professionals properly size electric pool heaters for efficient and effective heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kW \) — Required heater capacity (kilowatts)
• \( Volume \) — Pool water volume (gallons)
• \( \Delta T \) — Desired temperature increase (°F)
• \( Hours \) — Desired heating time (hours)
• 8.34 — Weight of one gallon of water (lbs)
• 3412 — Conversion factor (BTU to kWh)

Explanation: The formula calculates the energy needed to heat the water volume through the temperature change, then converts it to kW based on the desired time frame.

3. Importance of Proper Heater Sizing

Details: Correct heater sizing ensures energy efficiency, prevents equipment strain, and provides consistent water temperature.

4. Using the Calculator

Tips: Enter your pool volume in gallons, desired temperature increase, and how quickly you want to heat the pool. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my pool volume?
A: Use our Pool Volume Calculator or multiply length × width × average depth × 7.5 for rectangular pools.

Q2: What's a typical temperature increase for pools?
A: Most people heat pools 10-20°F above the unheated water temperature.

Q3: How long should it take to heat a pool?
A: Standard heating times range from 24-72 hours depending on pool size and heater capacity.

Q4: Does this account for heat loss?
A: No, this calculates ideal conditions. Add 20-30% more capacity for wind, evaporation, and nighttime cooling.

Q5: Can I use this for gas heaters?
A: No, this is for electric heaters only. Gas heaters use different calculations based on BTU output.