Simple Ways to Lower Your Home Energy Bill

Part of The Complete Guide to HVAC Maintenance

Replace your HVAC filter on schedule

A clogged filter makes your system work harder to push the same amount of air, which shows up directly on your bill. This is the single cheapest fix on this list and the easiest to let slide.

Seal air leaks around windows and doors

Gaps in caulking or worn weatherstripping let conditioned air escape and outside air in, forcing your system to work continuously to compensate. A simple way to check: hold a lit candle or incense stick near window and door frames on a windy day and watch for flickering.

Check your attic insulation

Insufficient attic insulation lets conditioned air escape upward in winter and heat build up in summer. This is a less visible fix than caulking but often has a bigger impact, especially in older homes that haven't had insulation upgraded.

Use a programmable or smart thermostat well

The savings here come specifically from adjusting temperatures during hours nobody's home or everyone's asleep — simply having a smart thermostat without changing the schedule doesn't save much on its own.

Address ductwork leaks

Ducts running through unconditioned spaces (attics, crawlspaces) can leak a meaningful share of conditioned air before it ever reaches your rooms. This is harder to DIY-diagnose than the items above, but worth mentioning to your HVAC technician at your next service visit.

Don't ignore uneven temperatures

If some rooms run hot or cold no matter what you do, your system is likely compensating by running longer than it should. Addressing the underlying cause (see our uneven temperatures guide) often reduces overall runtime, not just fixes the one room.