Honeywell ARD8TZ Round Automatic Damper, 8"
Brand: Honeywell
Features galvanized steel with single-blade damper, which closes off tightly against gasket for minimal leakage
Designated as power closed/spring return open damper for use with Honeywell Zoning Systems
Can be field-converted when used as an independent zone or for fresh air intake
Rated to operate up to 1-inch wc