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Average Pool Heaters Temperature Rise

Temperature Rise Per Hour (Pool Size in Square Feet)
BTU Size 500 Sq. Ft. 650 Sq. Ft. 800 Sq. Ft.
200 1 degree 1 -
250 1 1/2 1 1/2 -
350 2 1 3/4 1
400 2 1/2 2 1 1/4