Aire Technologies products are all tested, approved, or rated by a variety of National Recognized Testing Laboratories. Fire Dampers are UL555 rated, Combination Fire & Smoke Dampers, Corridor Dampers, and Smoke Dampers are UL555S rated for both fire and smoke, our Ceiling Radiation Dampers including all wood truss assembly rated products are UL555C rated, L587, & P556 classified. All of our extruded products comprised of louvers, penthouse, and gravity ventilators are either AMCA or Miami-Dade registered and approved. All of our products are built by sheet metal union workers.