1.Replace Worn Weather Stripping
Worn weather stripping around doors and windows creates drafts and lets in cold air. Seven to 12 percent of a home's heat loss occurs around windows and doors, and homeowners often turn up their furnace to keep comfy because of those leaks. Even if they don't turn the thermostat up, they're losing warm air, causing the furnace to work harder. "Weather stripping around doors, and caulking around doors and windows, can cut down on drafts.
Some weather stripping needs to be replaced every few years because of wear. Replacing it is typically as simple as pulling off the old and tacking on the new.