Many homeowners only discover how vulnerable house vents are after an animal or insect colony moves in. Bathroom exhaust fans, dryer vents, and other exterior openings connect directly from the outside of the house into the ductwork inside. Without proper protection, those openings can become entry points for bees, mice, birds, and other pests. In one case we experienced, hundreds of dead bees kept appearing in a bathroom before we discovered that a hive had been built inside the bathroom exhaust fan vent. The long-term solution is installing a properly designed exterior vent cover that keeps animals out while still More…