THE SAFEST DRYER VENT COVER ON THE MARKET. Eliminates air flow obstructions like birds and the need for dryer vent cover screens that quickly build up with lint, violate international building code and cause thousands of home fires every year in the US.ENERGY SAVING DUAL DOOR DESIGN eliminates energy robbing drafts from entering through the dryer vent cover and into your home. NO-PEST Vent cover has a magnetic door retention system to prevent dryer vent doors from flapping in gusty conditions the dryer vent cover outdoor seals tightly to keep out insects and rodents.EXTREME EFFICIENCY: Our Exclusive DUAL DOOR design creates a self-cleaning vortex around the outside of the vent cover that not only prevents lint build up but creates the highest efficiency exhaust air flow drying your clothes faster, saving your family time, money, and ensuring your dryer is running in optimal conditions.MADE IN THE USA: Our Vent Cover is made in Zeeland Michigan, and was designed because we couldnt find a solution for the birds entering the vent covers on our own houses. Because our cover is manufactured with American Plastic Resin and the highest Quality UV Resistance the original No-Pest Vent is still on the apartments they were originally installed on 15 years ago.MEETS ALL BUILDING CODES: The No-Pest Vent outdoor dryer vent cover meets all International Building Codes for a dryer vent cover & by NOT having a dangerous lint collecting screens that can lead to fire hazards it is the safest dryer vent cover pest guard option.