Lambro Industries 289W 4 inch Wall Exhaust Dryer Vent- Floating Damper

The Lambro 4-inch wall exhaust vent is ideal for venting through the wall. The exhaust vent features a floating damper that prevents outside elements and air from entering the vent. The floating damper seals the vent opening when the clothes dryer or bath fan is not running because no exhaust air exits the vent. When the clothes dryer or bath fan operates, the exhaust air pressure pushes the floating damper to let the exhaust air escape from the vent.You can easily use the exhaust vent for new and replacement installations over an existing 4-inch vent pipe. The vent frame comes with four screw holes to secure the vent and a caulk-friendly frame for completing the installation. The vent features an opening and closing cover that enables easy inspection and cleaning. Make sure to check the inside of the vent regularly to prevent lint build-up when using the vent to exhaust a clothes dryer.