UL Listed, FM Approved
CUL 793

Nystrom STC45 Series Our innovative two-door construction offers many advantages over the conventional four-door design. Designed for ease of installation, our smoke vent requires fewer field adjustments than a traditional four-door model. The Nystrom acoustical smoke vent can be connected to the building's life safety system. After a fire drill, a person on the roof can safely close the two doors from the top of the vent, or by using a 3-button control from as far away as the basement. Once the alarm system has been tested, it is easy to reset the smoke vent over and over again.

Our smoke vent walls are constructed of a high-technology composite of acoustical materials, which blocks sound more efficiently than the insulation that our competitors use in their smoke vent walls. This composite material in the walls, in combination with our specially designed gasketing system between the cover and the curb, provides maximum sound attenuation.

STC-36 Also available. Call factory.