One October weekend of sealing and servicing pays for itself across the heating season. This checklist runs in priority order, biggest savings first.
Seal the leaks first
The Department of Energy consistently ranks air sealing among the highest-return efficiency measures in a home, because heated air escaping through gaps forces the furnace to run more no matter how good the equipment is. On a windy day, feel around doors, window frames, attic hatches, and the holes where pipes and cables enter the house.
Weatherstripping doors, adding door sweeps, caulking window trim, and foaming penetrations costs little and installs in an afternoon. The attic hatch deserves special attention; an unsealed hatch behaves like an open window in the ceiling.
Service the heat before you need it
Schedule a furnace or heat pump tune-up in early fall, before the first cold snap fills every technician’s calendar. A professional check covers combustion safety, heat exchanger condition, and efficiency adjustments. Replace the filter now and stock replacements for the season.
Test carbon monoxide and smoke alarms the same weekend, replacing batteries as needed; the CPSC ties alarm checks to seasonal transitions precisely because heating season is when carbon monoxide risk rises. If you use a fireplace, have the chimney inspected and swept on its own schedule.
The water and pipe tasks
Set the water heater to 120 degrees Fahrenheit, the temperature that balances comfort, energy use, and scald safety in most guidance. Insulate accessible hot water pipes in unconditioned spaces with foam sleeves.
Outside, disconnect and drain garden hoses, shut off and drain exterior hose bibs where valves allow, and insulate exposed spigots. A burst pipe from a freeze costs more than every other item on this list combined, which is why the ten-minute hose task ranks so high.
Check the attic, gutters, and the small stuff
Peek into the attic: insulation should sit evenly, without gaps or compressed sections, at depths appropriate for your climate zone per DOE guidance. Topping up thin spots is a manageable DIY job; verify bathroom fans vent outdoors and not into the attic while you are up there.
Clean gutters and confirm downspouts discharge away from the foundation, reverse ceiling fans to push warm air down, and swap screens for storm windows where you have them. Homeowners on a budget can also check eligibility for the federal Weatherization Assistance Program, which funds efficiency improvements for income-qualified households.
Frequently asked questions
What is the single best task if I only do one?
Seal and weatherstrip the leaky doors and the attic hatch. It is cheap, permanent, and improves comfort immediately along with the bills.
Do window insulation film kits work?
Yes, meaningfully, on single-pane and drafty windows. The shrink film adds an insulating air layer for a few dollars per window and comes off cleanly in spring.
Is closing vents in unused rooms a good idea?
Generally no. Forced-air systems are balanced for the whole house, and closing vents raises duct pressure, which can reduce efficiency and stress the blower.