Master Flow ERV4WW Power Attic Ventilators Roof Mount, Weather Wood Hole Saws 2-3/8" or 2-3/4" backset

2-3/8" or 2-3/4" backset

Rigid Aluminum

Good disease and insect resistance

Non-slip traction pedals

Master Flow ERV4WW Power Attic Ventilators Roof Mount, Weather Wood Hole Saws 2-3/8" or 2-3/4" backsetPre 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