We just had a pool completed in May this year. A variable speed pump was pretty much mandatory for the main filter/cleaner pump. Yes I do think that the var speed pumps can save you money, but part of this is having the ability to schedule when the system runs the skimmers (low RPM) and the cleaner (high RPM) at the cheapest energy rates of the day.
One additional thing I would mention is that we just added solar heating to the pool. This will end up costing us more per month for electric, since the pump now has to run at a high RPM durring the most expensive rates of the day
requisite pic pre water
