With today’s continually advancing building engineering technology, design professionals are presented with a multitude of options for HVAC design. With such variety comes the burden of comprehending ...

Fire and smoke dampers are a proven and effective way to protect duct and air-transfer openings in walls, barriers, partitions, corridors, and shafts. Since the inception of Underwriters Laboratories ...

Installing a lock-top chimney damper is a common project among do-it-yourself homeowners. As fireplaces and chimneys age they tend to deteriorate from use, foundation shifting, and weather. This ...