
A poorly fitted mail or milk chute will let warm air sneak out and cold air creep in.
• Inspect chutes during your fall check of home heating and accessories.
• Weatherstrip where necessary around cracks and poorly fitted chutes.
• Springs. If the chute covers are on springs, make sure they close properly. A drop of oil can sometimes work wonders. If necessary, replace the spring. Keep a couple of spares on hand.