Lau, Upblast spun aluminum centrifugal roof exhausters are used widely whenever fumes, contaminated or higher temperature air is handled. The high velocity Upblast is thrown above the roof level for dispersion. Upblast units are built of rugged, durable spun aluminum. The latest aerodynamic designs are incorporated in the Upblast design. All units can be used with optional Lek-Trol speed controllers (Direct Drive Only) and curbs. These models carry the AMCA Certified Ratings Seal for air performance, and UL and CSA labels. Units may be wall mounted with field fabricated angle frame. Model #UBIVSR dimensional data-direct drive.