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BTU/hr Formula:
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The Pool Heater BTU Size Calculator determines the required BTU (British Thermal Unit) rating needed to heat your pool water to the desired temperature within a specified time frame. This calculation is essential for selecting the appropriate pool heater size.
The calculator uses the BTU/hr formula:
Where:
Explanation: The formula calculates the energy required to raise the temperature of the entire pool volume by the specified amount within the given time frame.
Details: Proper BTU calculation ensures you select a pool heater that can efficiently heat your pool to the desired temperature. An undersized heater will struggle to maintain temperature, while an oversized heater may be inefficient and costly.
Tips: Enter pool volume in gallons, desired temperature rise in °F, and the number of hours you want the heating to take. 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: 3.14 × Radius² × Average Depth × 7.5.
Q2: What is a typical temperature rise for pools?
A: Most pools are heated 10-20°F above the starting temperature, depending on climate and personal preference.
Q3: How long does it typically take to heat a pool?
A: Most pool heaters can raise temperature 1-2°F per hour, so a 10°F rise typically takes 5-10 hours.
Q4: What factors affect heating time?
A: Ambient temperature, wind, humidity, pool cover usage, and heater efficiency all impact heating performance.
Q5: Should I round up the BTU calculation?
A: Yes, it's recommended to round up to the nearest available heater size for better performance and efficiency.