I bought and then ended up with a "through the roof vent". Never installed/NEW IN BOX
Ventline V2215-21
Fits 2 ¾"- 4" Wall. 120 VAC- 60 HZ- 1.00 AMP- 100 CFM. Minimum cutout space for installation is 8 ½" x 9". Mounting plate (flat silver flange in photo) is 11 ⅝" x 11 ⅝"
Interior cover Measures 11 1/8" square and 1 1/2" deep. Made of steel. Mounting screws are separate.