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We swim yesterday for the first time this year. The water was 78 degrees and the pool enclosure mellowed out at 107. It was great. We don't have a pool heater. Just the enclosure and we also purchased a solar blanket that helped increase the water temperature a little. First swim April 5 2009, not bad for NC and no heater. Thanks for all your help with ordering and installation.
Cheryl & Carrie

Pittsboro, NC

Estimating Heat Pump Swimming Pool Heater Costs and Savings

US Department of Energy Swimming Pool Information

Estimating Heat Pump Swimming Pool Heater Costs and Savings

Table 1. Costs by Location of Heating Outdoor Pools with a Heat Pump*

Location	Season	Temperature
Location	Season	78°	80°	82°
Miami	1/1–12/31	$1100	$1460	$1845
w/ cover	1/1–12/31	$215	$300	$410
Phoenix	3/1–10/31	$680	$875	$1090
w/ cover	3/1–10/31	$45	$85	$125
Dallas	4/1–10/31	$760	$970	$1240
w/ cover	4/1–10/31	$90	$140	$205
Atlanta	4/1–10/31	$840	$1110	$1425
w/ cover	4/1–10/31	$155	$205	$290
Los Angeles	5/1–10/31	$950	$1210	$1485
w/ cover	5/1–10/31	$85	$155	$240
Kansas City	5/1–10/31	$715	$935	$1185
w/ cover	5/1–10/31	$145	$205	$270
New York	5/1–9/30	$740	$975	$1220
w/ cover	5/1–9/30	$105	$150	$200
Chicago	5/1–9/30	$810	$1035	$1270
w/ cover	5/1–9/30	$105	$150	$195
Denver	5/1–8/31	$875	$1055	$1245
w/ cover	5/1–8/31	$70	$100	$150
Boston	5/1–8/31	$875	$1075	$1280
w/ cover	5/1–8/31	$120	$165	$235
Minneapolis	6/1–9/30	$660	$850	$1040
w/ cover	6/1–9/30	$100	$125	$190
San Fran	6/1–8/31	$800	$950	$1110
w/ cover	6/1–8/31	$95	$165	$240
Seattle	6/1–8/31	$770	$900	$1035
w/ cover	6/1–8/31	$150	$215	$280

*Figures based on a 1,000 square foot, outdoor pool heated with an air to water heat pump with an average COP of 5.0 at $.085/kwh.

Table 2 estimates the annual savings of using a heat pump pool heater compared to using an electric resistance or gas pool heater.

Table 2. Annual Savings Comparisons of
Gas and Electric Pool Heaters*

Efficiency	Annual Cost	Cost w/ 5.0 COP	Heat Pump Savings
Gas Pool Heater
55%	$584	$200	$384
60%	535	$200	$335
65%	494	$200	$294
70%	$459	$200	$259
75%	$428	$200	$228
80%	$402	$200	$202
85%	$378	$200	$178
90%	$357	$200	$157
95%	$338	$200	$138
Electric Resistance
100%	$1000	$200	$800

Based on an electric resistance heated pool, which costs $1,000 per year at an electric cost of $.085/kwh, and using a natural gas cost 0f $.80/therm. A seasonal average COP of 5.0 was used to determine heat pump savings.