DUCT SYSTEM WITH BUILT-IN VOLUME REGULATOR

摘要

The invention relates to an air volume regulator assembly of the type used in the ducts of heating and cooling systems. A duct section is provided having walls on three sides thereof and a removable wall portion. A damper type regulator unit is mounted on the wall portion and is thereby easily removable for inspection and repair. A U-shape portal in the duct section is in spaced relation to the three walls and is in surrounding relation to the regulator unit. Sound absorbing material is between the portal and the three walls. In the illustrated embodiment of the invention the portal is attached to the removable wall portion.