US homeowners advised to customize thermostat settings amid heat wave

Energy experts say a single thermostat setting, such as the commonly suggested 78°F (25.6°C), does not suit every household during extreme heat. Variations in home insulation, size, sun exposure and occupants' health mean personalized adjustments are needed to balance comfort and electricity costs.

Practical measures that can lower cooling expenses without changing the thermostat include closing blinds on sun‑exposed windows, using ceiling fans to cool people rather than air, keeping interior doors open to improve airflow, and minimizing indoor heat sources such as ovens. These steps help keep homes comfortable while reducing the load on air‑conditioning systems.