Streivor Air Systems Centrifugal Downblast Roof Exhauster units are ideal for high volume, lower pressure air exhaust. The DD-DW (Direct Drive Downblast) models include deep spun venturis, all aluminum non-overloading wheels and can include an optional Lek-Trol speed controller and curb. These models carry the AMCA Certified Ratings seal for air performance, UL listed and CSA labels.
Streivor Air Systems certifies that the DD-DW Direct Drive Models shown are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.