Patent ID: 6213117
Filing Date: 2001-04-10
Classification: F23L

Abstract:
A damper unit adapted to be positioned in communication with a furnace at a furnace duct line for selectively providing fresh air to an indoor environment, comprising:a housing having an inlet opening in spatial communication with a fresh air source and an exit opening in spatial communication with the furnace duct line;a damper blade disposed completely in said housing and moveable between an open position which allows the passage of air through said housing and a closed position which blocks the flow of air through said housing;means for actuating said blade between its open and closed positions; anda fan disposed in said housing adjacent said blade, said fan operating to move air into said housing, across said blade in its open position, out of said exit opening, and into the furnace duct line wherein said actuating means and said fan are electrically connected to the furnace to be simultaneously operated in conjunction therewith.