The electricity savings that actually work, ranked: thermostat settings, water heating, LED swaps, and standby loads, with dollar estimates from DOE data.
Start with heating and cooling, then hot water, then lights and standby loads, in that order. That order matches where the energy goes: about half a typical home’s use is heating and cooling, 18% is water heating, and everything else fights over the rest (U.S. Department of Energy). Most lists get this backwards and lead with light bulbs.
Key facts:
Set the thermostat back when you’re asleep or out. A programmable or smart thermostat does it for you, and the 10% annual saving is the most reliable number in home energy.
Service the system. Dirty filters make the blower work harder. Sealed and insulated ducts can recover another meaningful slice in older homes.
If you heat with electric resistance (baseboards, an electric furnace), a heat pump is the single biggest upgrade available. It delivers 2 to 4 units of heat per unit of electricity because it moves heat rather than generating it. The physics is on our electricity-to-heat page.
Turn the tank down to 120°F. Wash clothes cold; modern detergents are built for it. Fix hot-water drips fast: a faucet leaking one drip per second wastes more than 3,000 gallons a year (EPA WaterSense), and if it’s the hot tap, you’re paying to heat every drop. Low-flow showerheads cut both water and the energy that warmed it. More on the double saving at water and energy conservation.
Swap remaining incandescent and halogen bulbs for LEDs. Put the TV-console-soundbar cluster on one switchable power strip. Retire the spare fridge in the garage; old second fridges are notorious bill-padders. Run dishwashers and washing machines full, not half-loaded.
Your bill’s kWh line is the scoreboard. Compare the same month year over year, since weather swamps everything else month to month. To predict a change before you make it, use E = P x t from our energy equation guide: wattage times hours tells you exactly what any device costs to run.
Curious what the average home pays in the first place? See the average electric bill.
Last updated: July 06, 2026
What saves the most electricity at home?
Heating and cooling adjustments. Setting your thermostat back 7 to 10 degrees for 8 hours a day saves about 10% a year on heating and cooling, per the Department of Energy. Nothing else on the list comes close for effort versus payoff.
Do LED bulbs really save money?
Yes. LEDs use at least 75% less energy than incandescent bulbs and last far longer. The Department of Energy estimates the average household saves about $225 a year by switching.
Does unplugging devices save electricity?
Some. Standby power runs 5 to 10% of residential electricity use per DOE. A power strip on the entertainment center and unplugging rarely used devices captures most of it without daily effort.
What temperature should my water heater be?
120 degrees Fahrenheit. The Department of Energy recommends it as hot enough for daily use while cutting heating losses compared to the common 140-degree factory setting.
Is it worth turning off lights when leaving a room?
With LEDs the savings per hour are small, but the habit costs nothing. With incandescent or halogen bulbs, always turn them off. The bigger win is replacing those bulbs.
