Master Flow® Green Machine™ Dual‑Powered Roof Vent ‑ ERVHYBRID

Unique technology automatically switches between solar (up to 500 CFM airflow) and house power (750 CFM airflow) to reduce heat/moisture in the attic. This unique dual-powered vent switches automatically between solar and house power to help reduce excessive heat and moisture in the attic during cloudy weather or at night.  When on solar power, it provides up to 500 CFM airflow1 and when on house power 750 CFM airflow1. Includes thermostat control and helps reduce the energy costs of purely house-powered vents.  It's also an eligible component of GAF residential enhanced warranties.