Wind-Driven Turbine Exhaust Ventilator: 19 in Head Dia, 12 in Throat Dia, 631 cfm @ 4 mph, Steel and lift it up again

and lift it up again to return to a vertical position that keeps debris inside

Mute setting allows users to turn ON/OFF the measure beep freely which is suitable for using in library

Wire Basket

DESCRIPTION              Non-Magnetic Glass Board

10 minutes on high setting

Wind-Driven Turbine Exhaust Ventilator: 19 in Head Dia, 12 in Throat Dia, 631 cfm @ 4 mph, Steel and lift it up againWind Driven Turbine Exhaust Ventilator: 19 in Head Dia, 12 in Throat Dia, 631 cfm @ 4 mph, Steel Wind driven turbine fans help ventilate structures without using electricity. As the wind blows, it turns the turbine and creates negative pressure. This low pressure draws hot air out of the structure and pulls in fresh air through openings in the structure. Brand EMPIRE Throat Diameter 12 in Overall Height 17 in Overall Width19 in Airflow @ 4 mph631 cfm