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LAARS
Pennant Pool Heater Sizing
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For Indoor Pools
The selection charts below will assist in choosing the correct size Pennant for an indoor pool. First, calculate the surface area of the pool in square feet. Second, refer to the selection chart. Third, find the closest square footage in the 10°F (6°C) Temperature Difference column, and the heater model which corresponds to it. For normal conditions, Laars recommends using the 10°F (6°C) Temperature Difference columns; this will provide a temperature increase of approximately 6°F (3°C) per 24 hour period.
For Outdoor Pools
The selection charts below will assist in choosing the correct size Pennant for an outdoor pool. First, determine the difference between the desired pool temperature and the average air temperature during the coldest month in which the pool will be used (referred to in the chart below as “Temperature Difference”). Second, calculate the surface area of the pool. Third, refer to the selection chart. Listed are the maximum pool surface areas for each heater model with typical temperature differences. Make the appropriate selection from the chart.




Model

Desired Temperature Rise in Degrees

10°F 15°F 20°F 25°F 30°F 35°F 40°F 45°F 50°F

Surface Area of Pool in Square Feet

500 4090 2720 2040 1630 1360 1170 1020 910 810
750 6130 4090 3060 2450 2040 1750 1530 1360 1220
100 8180 5450 4090 3270 2720 2340 2040 1820 1630
1250 10230 6820 5110 4090 3410 2920 2550 2280 2040
1500 12270 8180 6130 4910 4090 3510 3060 2730 2450
1750 14320 9540 7160 5720 4770 4090 3580 3190 2860
2000 16370 10910 8180 6540 5450 4680 4090 3650 3270

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