Backdraft dampers are made of galvanized steel and prevent air leakage into your fan setup. They are easy to install, fit directly onto the ducting, and prevent a back draft of air when the fans are switched off. They also save CO2 and prevent odors from flowing backwards. Silencers reduce noise from fans and carbon filter systems, are easy to hang with lightweight aluminum construction and, do not rust! The best location is as close as possible to the source of noise. Find the duct damper, duct muffler or duct silencer you need in a wide range of sizes. Come check out our large selection of noise killing devices! Our dampers help you control both hot and cold temperatures in individual rooms. We offer the highest quality silencers and mufflers. Phat mufflers offer 85% noise reduction in your grow space. Suncourt mufflers offer easy installation straight into your ductwork without impeding your airflow.