A critical component to your complete ductwork system are the parts that come after the fan, at the point of exhaust. In fact, many of the most challenging solutions take place after the fan and prior to exhaust. Duct products at the end of the ducting system can adversely or positively affect fan performance, CFM rates, roof penetrations and environmental factors.
US Duct offers standard and custom fabrication for exhaust and roof penetration components that provide the optimal solution.
Proper exhaust of your ducting system needs to address two primary factors: air-flow and rain water intrusion. When the exhaust from the fan exits the system, the best path is straight into the environment. Adding an elbow or bend to the top of your exhaust pipe can restrict air-flow and increase fan resistance – adding to fan operation costs and wear. Although a straight exhaust reduces that restriction, the open end will allow for rain water to enter the pipe and descend down the pipe to enter the fan, potentially damaging the electrical or other components. Adding a US Duct exhaust system of either a rain cap, no-loss stack, or double flap exhaust stack will minimize air-flow issues and prevent the intrusion of water into the system.