Doors: Shut out wasted energy

• Install a storm door with weather stripping and a bottom sweep to seal the elements outside. Replace thresholds so the cold doesn't sneak under the door.
• Cover areas around letterboxes and keyholes with flaps or brush seals to prevent heat from escaping.
• Replace weather stripping and seals on doors. You will save between 5 and 10 percent on your annual heating and cooling costs.