Greenheck’s recently UL-approved, three-sided retaining angle installation method for fire and combination fire smoke dampers is ideal for installations where the damper sleeve is tight up against a ...

Description: Greenheck’s HBT-221 rectangular bubble-tight damper is now available in larger sizes up to 48x52 inches in a single section. This allows larger openings to be filled with one ...

Keeping buildings safe from the threat of fire is a responsibility we all share as fire code inspectors, fire and smoke damper inspectors, building owners, and facility managers. Our overriding goal ...