Product details:
Exhaust fan, through-the-wall, duct dia 8 3/8 in, cfm 0000-in sp 180, sones hvi 6.5, Voltage 120, 60 hz, 1.5 Amps, housing length adj 4 1/2 to 9 1/2 in, housing width 14 1/2 in, housing height 14 1/4 in, grille length 11 1/2 in, grille width 11 1/2 in, includes back draft damper and on-off switch exterior wall-mounted fansadjustable housings. Paintable grilles. Ul listed. Motors: 120v/60 hz optional controls sold separately.