I just bought a house that has a Pentair WhisperFlo WFE-4 1 HP filter pump that I would like to switch to something more efficient. I heard variable speeds are the way to go… but b/c this is a dedicated line (filter only), could I just do a lower power motor?
You could go with a 1.65 variable-speed motor or complete pump and it would still be more efficient than a 3/4HP running at full speed. The VS motor’s energy consumption decreases dramatically as the speeds are reduced.