Heater/Chiller BTU’s Heat Pump


Aug 20, 2021
Hi there. We are looking at getting a heater/chiller installed (I decided this after all equipment was installed but before electrical). So I had the correct AMPs installed for the future.
I have electric only. Taking BTU’s. I know the higher you go the more $$. My pool which is almost done will be about 10-12k gallons. Closer to 10k. What size BTU do you recommend? Retailers are advising me 120k BTU or higher. This is to extend and start our season early. Thank you!


TFP Expert
Mar 2, 2011
Get the biggest available.

12,000 gallons is 100,000 lbs of water.

120,000 btu/hr will add 1.2 degrees per hour, but you will also begin losing heat as soon as you begin heating, so the actual gain rate will be lower.

If you gain 1.2 degrees and lose 0.4 degrees per hour, the net gain is 0.8 degrees per hour.


TFP Expert
Platinum Supporter
May 23, 2015
Tucson, AZ
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
As with any form of pool heater, gas or electric, you will only be throwing away money if you don’t get a pool cover as well. Once overnight temps drop below your pool water temp, evaporative heat losses will dominate and your heat pump won’t be able to keep up. A cover is a must.

  • Like
Reactions: JamesW
Thread Status
Hello , This is an inactive thread. Any new postings here are unlikely to be seen or responded to by other members. You will get much more visibility by Starting A New Thread