Semi-Down Draft

Semi-downdraft paint booth airflow diagram showing filtered air entering through the ceiling, moving downward and horizontally through the booth, and exiting through the rear exhaust filters.
Paint Booth Airflow Guide

How Does a Semi-Downdraft Paint Booth Work?

A semi-downdraft paint booth combines elements of downdraft and cross-flow airflow designs. Filtered air enters through the ceiling intake, moves downward into the work area, and travels horizontally toward the filtered exhaust at the rear. This hybrid airflow pattern offers an alternative to a traditional cross-flow booth without requiring the full subsurface exhaust pit of a pitted downdraft system.

01. Ceiling Air Intake Incoming air passes through ceiling-mounted intake filters and enters the booth from above.
02. Hybrid Airflow Air moves downward from the ceiling and then horizontally across the work area toward the rear.
03. Rear Filtered Exhaust Air and airborne overspray move toward the rear exhaust filters and out through the designed exhaust system.
Considering a heated makeup air unit (AMU)? Semi-downdraft booths can be configured to support makeup air and heating when the intake system is designed for it. Confirm the intake arrangement, heating requirements, and compatibility with your selected booth before ordering.