Variable-Speed Pump: Is It Worth It in Arizona?
If your single-speed pump is dying, you'll almost certainly be offered a variable-speed replacement. Here's how to think about it, without invented savings figures.
How variable-speed pumps differ
A single-speed pump runs at full speed whenever it's on. A variable-speed pump uses a permanent-magnet motor and a drive that let it run slower for routine filtering and faster when you need it (vacuuming, spa jets, water features). Because the power a pump draws falls off sharply as its speed drops, running longer at low speed can use much less energy than short runs at full speed. The DOE and ENERGY STAR both explain this principle.
Why it matters more in Tucson
- Pools here often run long pump schedules in summer to keep the water clear in the heat.
- Many Tucson pools are used, or at least circulated, year-round.
- Slower operation is also usually quieter, which neighbors and HOAs tend to appreciate.
Federal rules
U.S. Department of Energy efficiency standards for dedicated-purpose pool pumps took effect in July 2021. In practice, many replacement filter pumps now on the market are variable-speed models. Your contractor can tell you what's compliant for your pool's size.
Rebates
TEP has offered pool-related efficiency programs in the past. Programs and amounts change, so check TEP's website before you buy, and confirm whether a qualifying model or installer is required.
Questions to ask the contractor
- Is my current pump repairable, and what would that cost compared with replacing it?
- Is this pump sized for my plumbing and filter?
- Will it work with my automation system?
- What run schedule and speeds do you recommend for summer and winter?
- What warranty comes with it, and who handles warranty claims?
- Can I see your ROC license number? (Verify it at roc.az.gov.)
Ready to compare options? Get connected with a pump pro.