1. Set your thermostat to 68°F when you're home and lower it at night or when you're away. A smart thermostat does this automatically.
2. Change your filter regularly.
3. Seal drafts around doors and windows.
4. Keep supply vents and returns clear.
5. Run ceiling fans clockwise on low to push warm air down.
6. Schedule a fall tune-up so your system runs at peak efficiency.
7. Ask about duct sealing: leaky ducts can waste up to 30% of your heating.