UNI-DUCT® Exhaust Program

Particulate or fume exhaust systems should be designed for specific minimum carrying velocities to prevent the material from settling and plugging the duct. With UNI-DUCT, these velocities can be entered for each type of particulate or fume where it enters a system. UNI-DUCT designs the system to maintain all specified carrying velocities. A section with more than one carrying velocity requirement is sized to maintain the highest velocity requirement.

After designing the system to meet carrying velocity requirements, UNI-DUCT analyzes the pressure requirements and determines the design leg. Since non-design legs and branches have excess pressure, they need to be balanced. Like the UNI-DUCT supply module, the exhaust program uses a complex iterative procedure to reduce duct and fitting sizes so that the available total pressure balances the system without increasing its design pressure. Optimizing a design in this way reduces duct and fitting costs considerably.

An exhaust system designed with UNI-DUCT operates at the lowest pressure required to maintain the design carrying velocities. Initial costs are lower because smaller sizes of duct are used and blast gates, cutoffs, and dampers often are not required.

© 2002-2008 McGill AirFlow LLC
An enterprise of United McGill Corporation—Family owned and operated since 1951

Unless otherwise noted, all (™) trademarks and (®) registered trademarks are property of United McGill Corporation.