508 Broan 270cfm through-wall fan.

Broan model 508 through-wall exhaust fan kit, 270 cfm. Complete with outside hood and backdraft damper.
Damper opens when fan turns on, closes air tight when fan turns off.
Dual flow for superior air movement and weather seal.
Twist lock motor mounting bracket.
4-pole motor, 120V, 60hz.
Adjusts for walls 4-1/2" to 9-1/2" thick.
White plastic grille measures 11.5 x 11.5.
6 sones.
10" housing.

Also available in model # 509 which moves 180 cfm's of air.