The maintenance that trims your utility bill is mostly about not making equipment work harder than it has to. Heating and cooling is close to half of a typical home's energy use, so the highest-value habit is a clean HVAC filter and a sealed envelope with no drafts pulling conditioned air out. A clogged filter or a leaky window shows up on every bill.
Quick energy savings checklist
- Change the HVAC filter on schedule.
- Seal drafts around windows and doors.
- Clear the dryer vent.
- Clear the AC outdoor unit.
- Flush sediment from the water heater.
- Vacuum the refrigerator coils.
- Swap remaining bulbs for LEDs.
- Check the refrigerator door seal.
Change the HVAC filter
A clogged filter chokes airflow, so the system runs longer to move the same air and uses more energy doing it. Check it monthly during heavy heating and cooling and replace it when it looks gray, usually every one to three months.
Seal drafts around windows and doors
Air leaks are wasted heating and cooling you pay for twice. Caulk fixed gaps and add weatherstripping to doors and operable windows. Energy.gov estimates sealing leaks and adding insulation are among the highest-payback fixes a homeowner can make.
Clear the dryer vent
A lint-clogged duct makes the dryer run two and three cycles to dry a load, which wastes energy and is the leading factor in dryer fires. Clean the lint screen every load and clear the full duct at least once a year.
Clear the AC outdoor unit
A condenser smothered by leaves and grass can't shed heat, so it runs longer and harder. Give it about two feet of clearance and, with the power off, rinse the fins so it cools efficiently through summer.
Flush the water heater
Sediment in the tank insulates the burner from the water, so it takes more energy to heat. Draining a few gallons a year per the manual keeps it efficient and quiet.
Vacuum the refrigerator coils
Dusty condenser coils make the fridge run longer to stay cold. Vacuum them once or twice a year, more often with pets, so the compressor isn't fighting a blanket of dust.
Swap bulbs for LEDs
LED bulbs use about 75% less energy than incandescents and last far longer. Replacing the bulbs you use most is a quick win on the lighting share of the bill.
Check the refrigerator door seal
Close the door on a dollar bill and tug; if it slides out easily the gasket is leaking cold air. Clean the gasket, and replace it if it's cracked or no longer grips.
Beyond maintenance: bigger wins
The maintenance above keeps existing equipment efficient, but the biggest long-term savings are attic insulation, air-sealing the attic and basement, and replacing aging heating and cooling equipment when the time comes. Those are project-level investments, not weekend tasks, but they shift the math more than any filter change. A home energy audit (many utilities offer free or subsidized ones) will rank them for your house.
Good maintenance rhythm
The checklist gets you through the energy pass once. Keep things running smoothly all year round by following a regular maintenance schedule.
- Monthly: check the HVAC filter and replace it when it looks dirty.
- Yearly: seal drafts, clear the dryer vent, and flush the water heater.
- Before cooling season: clear the AC outdoor unit.
- Twice a year: vacuum the refrigerator coils.
- As bulbs burn out: replace them with LEDs.
- Yearly: check the refrigerator door seal with the dollar-bill test.