They are a highly universal option for both zoning an ventilation applications. 12 x 12 Two-Position Zone Damper - Powered Open The HD Series dampers are extruded aluminum parallel blade dampers complete with a 24 volt spring return actuator.
Triple ridge corrugated rails are constructed from 1/8" thick material, made for high impact resistance indoors or out.Create a modular system to protect equipment, inventory, and individuals from damage or injury with this highly visible powder coat yellow Structural Guard Rail. Concrete mounting kit is available separately.