Schedule annual furnace inspection and clean
10Replace furnace air filter
5Test thermostat and replace batteries
Inspect and clean furnace exhaust vent and intake
Seal drafts around windows and doors
Check carbon monoxide and smoke detector batteries
5Schedule duct cleaning if overdue
Programmable thermostat schedule — optimize for fall/winter
10Fall furnace filter replacement — set a reminder schedule
5Inspect and clean humidifier — winter indoor air quality
12Inspect and clean dryer vent — fire safety and efficiency