VRAD

The VRAD negative pressure relief door also opens automatically at 1 in. wg above normal operating system pressure. This door prevents ductwork from imploding if system damper(s) close while the fan is still operating.

Pressure Relief Doors

Damper Selection Guide

Which damper best fits the application? Greenheck’s damper interactive selection guide removes the guesswork. Find blade type, velocity, pressure, AMCA listings, submittals, drawings and more, all in one easy-to-use format.

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Need a specific configuration? Submit a request online and get a quote from your local representative within 4 hours.

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