variable speed pump

[bradc344]

I heat my pool with a heat pump and right now the system is on about 12 hours a day in about about a month I will be able to cut back to about 8 hours a day which is were I run it the rest of the year thanks for the reply very informative you probably just saved me some money my current system is only three years old so I will just leave it alone thanks again......

[mas985]

The heat pump requirement changes the economics by quite a bit because you are forced to run the pump longer than what you actually need for just circulation. I did my analysis based upon a single turnover but at 12 hours you are over 5 turnovers.

Even 8 hours per day is way more than what you need since it is over 3 turnovers. With 2" plumbing you are probably getting close to 90 GPM which would be about a 2.25 hour turnover. So you could save a lot of money just by reducing your run time by a lot and still have a clean pool. Also, the heat pump should be able to work on low speed of a two speed pump so you can save even more by changing out the motor. If you have to run 12 hours a day for the heat pump, that would shorten your break even by at least half.

[bradc344]

The twelve hour run time is only dec, jan even then till mid spring and early fall it runs at least 4to 6 hour a day go to know about the turn over because I can really reduce my run time in the summer months when we are gone ,thanks again for the help ......

[CarlD]

If your controller can also control a 2spd pump, then you'd ONLY run on high for pool cleaning, and run on low the rest of the time. I don't know if low speed is cheaper than VS, but the rebate and the difference in pump cost may make it a wash...and 2spds are probably simpler to maintain and fix.