Garage door enclosure duct adapter.

thingiverse

I designed an incredibly simple air duct adapter using some flexible duct I purchased from Lowes, which measures approximately 100mm in diameter, and a 120mm fan. To ensure a secure attachment, I threaded braided threads into the fan. Here are the specific products I used: https://www.amazon.com/gp/product/B01CSNEO2G/ref=ppx_yo_dt_b_asin_image_o02_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B019Q3U72M/ref=ppx_yo_dt_b_asin_image_o02_s01?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B07MWBJB67/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 The adapter fits neatly under a garage door, but it does leave a small gap underneath the door that you may want to cover. Nonetheless, it effectively vents out fumes with great success.