Paint Booth Exhaust Ductwork for Downdraft Booths
Downdraft paint booth exhaust ductwork has to move air from the floor or pit area to the fan and discharge path while preserving booth balance. Double D Mechanical coordinates duct routes with floor openings, exhaust plenums, fan locations, make-up air, controls, structure and maintenance access.
Discuss your installationFloor Exhaust to Fan Route
Downdraft booths often pull exhaust through pits, basements or floor plenums before it reaches ductwork. The route should be reviewed for elevation changes, structural conflicts, cleanout access and the transition from booth base to fan inlet.
Balancing Supply and Exhaust Air
Exhaust ductwork cannot be planned apart from replacement air. Fan capacity, make-up air delivery, booth pressure and door behavior all affect whether the booth operates smoothly during spraying.
Roof or Wall Discharge Planning
Discharge routing may pass through roof structure, wall panels or existing mechanical areas. Clear coordination helps avoid conflicts with joists, utilities, overhead doors, cranes, mezzanines and other equipment.
Service Access Below and Above
Filters, dampers, belts, fan bearings, access doors and duct cleanouts need reachable space. Planning for maintenance access reduces the chance that routine service requires dismantling nearby equipment.
Frequently asked questions
What makes downdraft exhaust ductwork different?
The exhaust path usually starts below the work area, so pits, floor plenums, basements and below-grade transitions can shape the duct layout.
Does make-up air need to be reviewed with exhaust ductwork?
Yes. Exhaust volume and replacement air need to work together so the booth maintains stable airflow and door behavior.
What should be ready before a ductwork visit?
Have booth drawings, pit details, photos, fan information, roof or wall constraints and notes about current airflow or odor issues.
Can existing ductwork be reused?
It may be possible, but condition, size, routing, clearances, fan connection and access points need to be checked before reuse is planned.
Who else may need to be coordinated?
Electrical, roofing, controls, fire protection and building maintenance teams may all need to coordinate around exhaust ductwork work.