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Heat Pump Sizing

Sizing of a heat pump pool heater is based on the pool's surface area, geographic location, environmental conditions such as shading, wind, blanketing against night time heat losses, and more. 

Below are general sizing guidelines assuming the pool is in full sun and a solar pool blanket is in use. The existence of shade over the pool will suggest a larger size heat pump. See all heat pumps


If your pool is...

Aboveground Round Pool: 12 feet up to 15 feet
Aboveground Oval Pool: 10 x 15 feet up to 12 x 18 feet

consider this choice:

If your pool size is...

Aboveground Round Pool: 18 feet up to 21 feet
Aboveground Oval Pool: 12 x 14 feet up to 15 x 14 feet
Inground Pool: UP TO 10 x 20 feet

consider these choices:

If your pool size is...

Aboveground Round Pool: 24 feet
Aboveground Oval Pool: 15 x 30 feet
Inground Pool: UP TO 12 x 24 feet

consider these choices:

If your pool size is...

Aboveground Round Pool: 28 feet to 30 feet
Aboveground Oval Pool: 18 x 33 feet to 20 x 40 feet
Inground Pool: 14 x 28 feet to 16 x 32 feet

consider these choices:

If your pool size is: 16 x 32 feet to 18 x 36 feet;
consider these choices:

If your pool size is: 18 x 36 feet to 20 x 40 feet;
consider these choices:

If your pool size is: 20 x 50 feet;
consider these choices:

If your pool size is: 3 Phase COMMERCIAL
consider these choices:


FS = Full Season
LS = Limited Season

Model BTU COP FS/LS Pool Size Sq Ft
AT550
102,500
6.2
FS
12 x 24 - 16 x 32
288 - 512
LS
18 x 36 - 20 x 40
648 - 800
AT700
109,000
5.7
FS
12 x 24 - 16 x 32
288 - 512
LS
18 x 36 - 20 x 40
648 - 800
AT1200
126,000
5.7
FS
18 x 36 - 20 x 40
648 - 800
LS
20 x 50
1000
AquaCal (Heatwave and Tropical)
SQ110
100,000
6.0
FS
12 x 24 or smaller
288 or less
LS
12 x 24 - 16 x 32
288 - 512
SQ120
110,000
5.8
FS
12 x 24 - 16 x 32
288 - 512
LS
14 x 28 - 16 x 32
392 - 512
SQ135
125,000
5.9
FS
14 x 28 - 16 x 32
392 - 512
LS
18 x 36 - 20 x 40
648 - 800
SQ155
135,000
6.3
FS
18 x 36 - 20 x 40
648 - 800
LS
20 x 50
1000
SQ121R
108,000
5.6
FS
12 x 24 - 16 x 32
288 - 512
LS
18 x 36 - 20 x 40
648 - 800
SQ155R
127,000
5.5
FS
16 x 32 - 18 x 36
512 - 648
LS
18 x 36 - 20 x 40
648 - 800
GS1000
85,000
6.0
FS
16 x 32 - 18 x 36
512 - 648
LS
18 x 36 - 20 x 40
648 - 800
GS1500
100,000
5.6
FS
18 x 36 - 20 x 40
648 - 800
LS
20 x 50
1000

For specific Heat Pump sizing, please complete the sizing form and fax to 800-897-6527 and we will prepare a free cost of operation and pool heater sizing analysis.

BTU: British thermal unit. A BTU is the measured amount of heat output the unit will produce. The BTU output will fluctuate with the outside air temperature and humidity levels

COP: The coefficient of performance of a heat pump is the measured ratio of kilowatt usage compared to the kilowatt output. The greatest value a heat pump provides a pool owner is to deliver a warm pool or hot spa at the lowest possible cost of operation.

FS: Full Season: All months where daytime temperatures are 50 degrees or above – generally this is twice the normal or traditional swim season, i.e. in northeast the traditional season is late May to the first week in September – full season is May 1st through November 1st (6 months) – our solar sizing map shows the full season capability nationwide

LS: Limited Season: Months where swimming may be possible without heat or with little heat needed.

The samples above show one heat pump for two different size pools: the smaller pool can be heated with the heat pump for the entire swimming season, the larger pool can be heated with the same heat pump but only during the hotter months of the year.


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Heat Pumps
Overview
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Compare heat pump pool heaters, solar pool heaters, and gas pool heaters in this side-by-side:
Comparison Chart

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