Quote:
Originally Posted by Pballer
Variable speed pumps are made to run efficiently at slower speeds for longer times. Running at 50% speed reduces by 75%-85% the energy used per hour as compared to running at 100%, while flow is only reduced by 50%. Google "pump affinity laws". As an added bonus, pumps are much quieter at slower speeds so you will not disturb yourself and your neighbors.
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Our pump is programmed to automatically adjust the speed depending on what features are running and how much water needs to be circulated through the plumbing. If it’s just the filter, the pump runs at 40%. If we turn on the waterfalls or the heat pump, it bumps up to 60%. If the rooftop solar heat is running it jumps to 90% so it can push the water up onto the roof and through the 6 solar panels. When in the pool, if I stick my finger into one of the water return outlets to block the flow, you can see a noticeable increase in water flow coming out of the waterfalls. I can easily tell when the filter needs cleaning by the flow of water from the waterfalls. If I stand under the waterfall with my head against the wall, I know the filter needs cleaning if the waterfall hits my nose. Everything is connected.