Heat pump cost estimates

[Enzodast]

Hey all,

I'm in CT with a 37,500 gallon in ground pool. When I built the pool I had a dedicated 220v 50amp circuit pre ran for a future heat pump.

I'm curious as to what you all see for your running costs to keep your pool around 82 in Connecticut for the season.

I run my pump about 8 hrs a day....I don't see much talk about the need to increase your pump running time for a heat pump to be effective. It's one thing paying the cost of the electricity for the pump but if I need to run my pool filter pump now 16+ hours that's a massive increase in cost.

Any feedback on this would be great! Thanks!

 

[Davegnh]

How long do you consider your season? What is your pool temperature typically without a heat pump. If you want to swim in May and your pool is typically around 75° each day you will need to add 7° to your pool This will take 2.2 million BTUs. With 140,000 BTU heater estimating in May it will only be adding 115,000 BTUs per hour. You would have to run your pump 18 hrs And most heat pumps use around 5 to 6 kW per hour. Then for other days, how much temperature does your pool typically lose in a day overnight if it’s three or 4° You would then only have to run the pool pump eight or nine hours to make up for the temperature loss. You can also use some online calculators like this one to estimate Heat Pump Heater Sizing

 

[Newdude]

I had a similar sized pool with a HP on Long Island only a few miles south of you.

Pre TFP, I was told to leave it on as it was better at maintaining the already warm pool than catching up heating a cool pool. It was $600 for the cool month and $800 for the cold month of the extended season (either end). Adding a solar cover cut that in half to $300/$400. We didn't use it in the warm months.

Post TFP, I'd probably manage it differently and heat only during the day when the HP would be considerably more energy efficient, and rely on the solar cover to retain most of the warmth for the next day. If it had to add 4 degrees the next morning, it would probably use less energy than trying to maintain those 4 degrees on cool nights.