Cable Pass Through Wall Port | Fits Cable Sizes up to 3-Prong Plug | Compatible with 3 5/8” - 5 1/4” Wall Thickness | Provides Solid Channel Through Wall (White)

I used foil tape to seal off the exposed insulation and the interior and exterior paneling, added the vent covers, and sealed the exterior one around the opening with silicone. I think the exterior vent cover has a pipe attached that passes through the wall, and the interior cover fits into or over it. Then interior vent cover just screwed into the paneling. For the electrical penetration, I used something like this and similarly taped up the hole, siliconed the outside, etc: https://a.co/d/0a3M3Yy8 And then used a putty that’s made for sealing wall penetrations to seal off around the cord. It can be dug out if need be should the fan need replacing. Probably not to code but it works ¯\_(ツ)_/¯