A recently granted patent (Publication Number: US11761507B2) describes a damper assembly that includes a damper with a pressure tube and a piston. The assembly also includes a bellow accumulator ...
UL-listed dampers are often located behind the louver to protect and control the flow of air into and/or out of the building. The size and mounting location of these dampers must meet UL installation ...
SCHOFIELD, Wis. — Greenheck’s HBT-221 rectangular bubble-tight damper is now available in larger sizes up to 48 by 52 inches in a single section. This allows larger openings to be filled with one ...
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