Master Flow ERV4WW Power Attic Ventilators Roof Mount, Weather Wood Cable Contains everything needed to make

Contains everything needed to make a screen frame that will accept aluminum fiberglass mesh screen or flexible poly film

Begins working in 60 minutes

Over molded rubber end caps provide shock absorption

Head Type: Forged Milled

Kills insects

Master Flow ERV4WW Power Attic Ventilators Roof Mount, Weather Wood Cable Contains everything needed to makePre wired roof mount attic vent and thermostat control; helps exhaust large amounts of hot and humid air from your attic; helps protect your roofing system and promotes your home's energy efficiency; energy efficient PSC (permanent split capacitor); includes internal heavy duty screen which helps prevent animal infestation. Highlights: Roof Mount Galvanized Steel Max Attic Size = 1600 Sq Ft Net Free Area = 480 Sq. Ft. Color : weather wood Airflow Cfm