Broan 512M 6 through wall ventilation fan 70 CFM 3.5 Sones. Easy exterior wall installation features a white interior grille and louvered exterior wall cap with built in bird screen. 6 Inch diameter flexible aluminum duct included. Accommodates walls from 5 1/4 Inch to 10 Inch. Use with remotely mounted wall switch or Broan model 57W or 57V. Variable speed control available separately . Wall cap measures 8 Inch square.
