Updated October 23, 2026 · Example schedules are not filtration recommendations
A pool pump is a good candidate for a closer look because its schedule can be easy to identify. The useful numbers are electrical watts at each operating speed and the hours spent at that speed. Horsepower alone is not a measurement of electricity consumed.
Start with the current schedule
Write down every operating block, including higher-speed operation for features or cleaning. Find a power reading or model-specific electrical input for each setting. If the pump reports watts, check what the display represents and whether the reading changes with operating conditions.
A one-speed example
360 kWh × $0.16 = $57.60
The wattage, runtime, and price are chosen examples. Enter your own values in the appliance cost calculator.
Calculate a mixed-speed schedule
Calculate each block separately and add the results. The following example does not claim equivalent circulation or sanitation performance to the one-speed example.
| Operating block | Power | Hours/day | Daily energy |
|---|---|---|---|
| Block 1 | 400 W | 8 | 3.2 kWh |
| Block 2 | 1,500 W | 2 | 3.0 kWh |
| Total | — | 10 | 6.2 kWh |
At 16¢, this chosen schedule costs $0.992 daily, or $29.76 over 30 days. Reproduce it with two calculations and add their unrounded energy totals. Applying 1,500 watts to all ten hours would incorrectly give 15 kWh a day.
Do not infer power directly from RPM
A lower speed can change energy use, but a speed percentage does not establish the wattage for your installation. Use actual readings at the settings being evaluated. Flow requirements and the pump’s operating conditions matter.
Keep the pool’s needs in the decision
Any revised schedule must still meet the pool’s filtration, circulation, sanitation, and equipment requirements. Follow the manufacturer and pool professional’s guidance. Do not reduce runtime solely because the arithmetic looks attractive.
The DOE pool-pump guide provides background on variable-speed installations and emphasizes suitable system operation. It is a 2012 technical reference, not a current model recommendation or a universal schedule.
Work out a possible payback
Suppose a verified change saves $15 per month during eight months of operation. That is $120 per year. A $600 additional installed cost would have a simple five-year payback, before financing, maintenance, and rate changes. These figures are hypothetical; use documented savings for the same pool duty.
Questions to ask before changing equipment
- What watts does the existing pump draw at the actual setting?
- What schedule does the pool need?
- What power does the proposed pump draw under that duty?
- What is the full installed cost, including controls or electrical work?
Source: DOE: Replacing Single-Speed Pool Pumps with Variable Speed Pumps (May 2012), checked October 23, 2026. Scenarios and cost arithmetic are illustrative. See our methodology.