on a garage dryer dump. They built a 2 foot by 2 foot cube. Installed a trap door that was about the size of a good size fist. then wraped the entire box with the finest screen door fabric that is also fiberglass. Then mounted the hose to the box. This was the lint catcher. It required less maintanance than the knee high that is for sure. The knee high works great but if you let it get full, it will back flow the dryer and cause problems.
The air flowing through the screen with be filtered in a way and too be warm.