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POOL HEATER SIZING TABLE
HOW TO USE THIS TABLE
1. Select the desired swimming temperature of the pool water.
2. Determine the mean (average) temperature of the coldest
month in which the pool will be used.
3. Subtract the mean temperature from the desired swimming
temperature. The difference is the temperature rise.
4. Calculate the surface area of the pool in square feet.
5. Under the column headed by the temperature rise determined in
Step 3, find the number close to, but not less than, the pool surface
area from Step 4. On that line, in the left hand columns, will be the
indoor and outdoor heater model numbers for the correct heater
size. Specifications and Dimensions for all models are shown in
the table on Page 2.
SIZING FORMULA
BTUH input required = Pool Area (Sq. Ft.) x Desired Temperature
Rise x 15.
Formula is based on 1° to 1-1/4°F. temperature rise per hour and
3-1/2 MPH average wind. Where high wind conditions exist,select
heater one size larger than determined by formula or this table.
FASTER HEATING
For 1-1/2°F. rise per hour: Increase BTUH input by 50%
For 2°F. rise per hour: Increase BTUH input by 100%
Always select a heater equal to or larger than the requirement.
Oversizing generally reduces fuel cost.
Table is based on a nominal 24 hour recovery period. To size a
commercial pool based on a nominal 30 hour recovery period
multiply listed pool size ("Pool Area in Square Feet") by a factor of
1.25. For special conditions consult factory.
20° 25° 30° 35°
INDOOR OUTDOOR
P-514 P-514 1,700 1,360 1,135 970
P-624 P-624 2,090 1,670 1,390 1,190
P-724 P-724 2,420 1,935 1,610 1,380
P-824 P-824 2,750 2,200 1,830 1,570
P-962 P-926 3,085 2,465 2,055 1,760
P-1125 P-1083 3,610 2,885 2,405 2,060
P-1223 P-1178 3,925 3,140 2,615 2,240
P-1336 P-1287 4,250 3,430 2,860 2,450
P-1468 P-1414 4,710 3,765 3,140 2,690
P-1631 P-1571 5,230 4,185 3,485 2,990
P-1826 P-1758 5,860 4,685 3,905 3,345
P-2100 - 7,000 5,600 4,665 4,000
P-2500 - 8,330 6,660 5,550 4,760
P-3001 - 10,000 8,000 6,665 5,710
P-3500 - 11,665 9,330 7,775 6,665
P-4001 - 13,330 10,665 8,885 7,615
HEATER
MODEL NO.
POOL AREA IN SQUARE FEET
DESIRED TEMP. RISE IN DEGREES F.