As I stated in another thread, I will be moving into a house in a few months that has an indoor pool/spa. I will most likely be replacing some of the pumps on the system this summer. Since this is a pool that is open year round, I find it very easy to justify the cost of a variable speed pump (for efficiency reasons).
That being said, the pumps I have been considering are the Intelliflo and the EcoStar (is there another similar or better pump that someone can recommend?) It was established in a separate thread that the EcoStar has higher efficiency than the Intelliflo, which is why I am leaning toward the EcoStar. But I like to be fully informed when I make decisions (perhaps overly so..) and I was wondering if anyone could point out any other technical differences in the pumps such as materials, bearings, wet end designs, or control interfaces.
I was also wondering exactly how these pumps do what they do as far as energy savings. Is it just a variable frequency drive that allows the pump to run at the minimum RPM required for a specific installation? Are these RPMs set up manually or do these pumps actually have the ability to sense a resistance to flow and respond accordingly?
Thank you in advance for your responses.