This model is a custom-designed exhaust duct system built for closet-based 3D printing environments— I use it for the Bambu Lab A1. It routes air from under the closet door to a window using centrifugal blowers and a one-way damper.

By sealing the closet (using weather stripping around the doors) and adding a small space heater inside, the internal chamber maintains a stable, warm environment suitable for printing high-temp filaments like ABS, ASA, and PA6 with no noticeable odors or warping.

Key Features:

• Flat door duct: Slides under standard interior doors to minimize clearance loss.
• Modular elbow + window vent: Routes airflow out through a window with an integrated check valve to prevent backdraft.
• Supports centrifugal blower mounting: I used two of this blower [https://www.amazon.com/dp/B0CKZ9QWM3?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1](https://www.amazon.com/dp/B0CKZ9QWM3?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1)