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Pool Heater Size Formula:
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The pool heater size calculation determines the appropriate heating capacity needed to raise your pool water temperature by a desired amount within a specific time frame. Proper sizing ensures efficient operation and optimal performance of your pool heating system.
The calculator uses the pool heater size formula:
Where:
Explanation: The formula calculates the energy required to heat a specific volume of water by a certain temperature, adjusted for heater efficiency and time constraints.
Details: Correctly sizing your pool heater is essential for energy efficiency, cost savings, and optimal performance. An undersized heater will struggle to maintain desired temperatures, while an oversized heater may cycle too frequently, reducing efficiency and lifespan.
Tips: Enter pool volume in gallons, desired temperature rise in °F, heater efficiency as a decimal (e.g., 0.85 for 85% efficiency), and desired heating time in hours. All values must be positive numbers.
Q1: How do I calculate my pool volume?
A: For rectangular pools: length × width × average depth × 7.5. For circular pools: diameter × diameter × average depth × 5.9.
Q2: What is a typical temperature rise for pools?
A: Most pool heaters are designed for a 1-2°F temperature rise per hour, but this depends on climate and usage patterns.
Q3: What are typical efficiency ratings for pool heaters?
A: Gas heaters typically have 80-85% efficiency, while heat pumps can reach 400-600% efficiency (COP of 4-6).
Q4: Should I size my heater for the entire season or just initial heat-up?
A: Size for the initial heat-up time you desire. Maintenance heating requires less capacity than initial heating.
Q5: Are there other factors to consider when sizing a pool heater?
A: Yes, consider climate, pool cover usage, wind exposure, and desired swimming season extension.