Very interesting, Mark. A couple of questions:

1. Why do you have the 2-speed pumps set to run for an hour on high, every day?

2. Why does do the two Whisperflo pumps have such different efficiency? (65% vs 51%)

3. What sort of motor does the Tristar have, to have such a good efficiency value? (I've heard some not good things about Tristars locally, in terms of reliability, though. Not sure how valid those reports are, but people seem to be having more problems that they would have with a SuperPump. But then the SuperPump may be the gold standard in terms of operational reliability.)

I didn't realize the motor efficiencies were that low, or that they varied so widely.