The biggest levers are when you run the AC, how well the system moves air, and how much sun hits the house. None of these has a promised dollar result, so test each against your own TEP bill. Climate Pros Tucson matches you with licensed local pros for the equipment checks.

When is TEP’s on-peak window?

Check your plan first. TEP lists Time-of-Use as a residential plan, with Basic, Peak Demand and Demand TOU as the alternatives. On the time-of-use plan, summer on-peak runs May through September, Monday to Friday, 3 to 7 p.m. Confirm current details at TEP’s time-of-use page. For plan trade-offs, read the best TEP rate plan for AC and why a summer TEP bill runs high.

Does pre-cooling help?

Often yes on a time-of-use plan. Cool the house a little before 3 p.m., then let the thermostat drift up during the peak. It only works if the house holds its temperature. If it reheats fast, ducts or insulation may be the real issue. Don’t push a setting that puts anyone’s health at risk. The CDC advises older adults to stay in air-conditioned buildings in hot weather and not rely on a fan as the main cooling.

What simple habits cut runtime?

  • Close blinds on west and south glass in the afternoon.
  • Use ceiling fans only in rooms people are using.
  • Replace the filter on the interval printed on it.
  • Keep plants and objects back from the outdoor unit so air moves freely. Shade is fine, but never block airflow.
  • Raise the setpoint a degree at a time and compare similar days on your bill.

Do dust and ducts matter in Tucson?

Yes. Dust storms occur during the monsoon, which runs June 15 through September 30, and dust coats the outdoor coil. Read how to clean AC coils in Tucson. ENERGY STAR says a typical forced-air house can lose about 20% to 30% of the air moving through ducts to leaks and poor connections. That’s a national statement, not a Tucson measurement. Ducts in a hot attic or on a roof deserve a look, and duct leak repair in Tucson explains how testing works.

Which TEP rebates are open for efficiency work?

As listed by TEP in October 2026, the Efficient Home Program offers up to $300 for duct sealing (the amount varies with how much leakage is reduced) and up to $160 total for an AC tune-up, through participating contractors. Amounts can change, so confirm with TEP at 866-473-8761 before you book. Federal 25C ended for installs after 2025.

When is the equipment the problem?

If the system runs constantly on a normal Tucson summer day and still can’t keep up, ask a licensed pro to check airflow, refrigerant and sizing. Replacement can lower consumption only when the new system is sized and installed properly. SEER2 compares rated seasonal efficiency, and actual savings vary with use. See AC tune-up, AC installation and the Tucson HVAC hub.

When the bill stays high

When the bill stays high after the basics, the system itself needs a look. Call (520) 353-2520 and we’ll match you with a licensed local pro.