Waterco Canada Inc. - Technology - Sizing your heat pump pool heater

Sizing your heat pump pool heater

Size at 4 BTU's per gallon or 1 BTU's per litre of water :
for normal summer conditions where daily average of ambiant air temperature maintains over 60° F at night and over 70° F in the day.
Size at 5 to 6 BTU's per gallon or 1.3 to 1.5 BTU's per litre of water :
for spring and fall conditions where daily average of ambiant air temperature maintains over 55° F at night and over 65° F in the day.
Size at 6 BTU's or more per gallon or 1.5 BTU's or more per litre of water :
for extended spring and fall conditions where daily average of ambiant air temperature maintains over 50° F at night and over 60° F in the day.

* We recommended the use of a pool cover during chilly period.

Above ground pool sizing chart
Pool size (feet)	Summer	Extended Summer	Extended Sprint/Fall
Up to 21 feet Up to 10 000 Gal	55 000 BTU	70 000 BTU	75 000 BTU
24 feet Up to 15 000 Gal	70 000 BTU	80 000 BTU	105 000 BTU
27 feet Up to 20 000 Gal	75 000 BTU	85 000 BTU	105 000 BTU
30 feet or more Up to 25 000 Gal	85 000 BTU	105 000 BTU	125 000 BTU

Inground pool sizing chart
Pool size (feet)	Summer	Extended Summer	Extended Spring/Fall
12x24 Up to 10 000 Gal	55 000 BTU	75 000 BTU	85 000 BTU
14x28 Up to 15 000 Gal	75 000 BTU	85 000 BTU	105 000 BTU
16x32 Up to 20 000 Gal	85 000 BTU	105 000 BTU	125 000 BTU
18x36 Up to 25 000 Gal	105 000 BTU	125 000 BTU	150 000 BTU
20x40 Up to 30 000 Gal	125 000 BTU	150 000 BTU	See your dealer

** More BTUs means more power, quicker results and less operation time.