http://www.purifresh.com/erv.html http://www.purifresh.com/erv.html https://swervair.com/ https://swervair.com/ A couple examples I see on Google. I'm not adv

http://www.purifresh.com/erv.html http://www.purifresh.com/erv.html https://swervair.com/ https://swervair.com/ A couple examples I see on Google. I'm not advocating for any of these, because I have no idea if they are any good, but I see no technical reason an ERV couldn't work as a window unit. Maybe it's an underserved market and someone should make a business out of that. A much more DIY example that's probably closer to what you were talking about with "hacking together" a solution: https://www.mychemicalfreehouse.net/2023/10/window-mounted-portable-erv-air-exchanger-how-to.html https://www.mychemicalfreehouse.net/2023/10/window-mounted-p...