Fan damper

A method for preventing air and light from entering a discharge opening of a fan when a fan is deactivated and for allowing unimpeded air flow when the fan is activated, which comprises the steps of:

• a) providing a damper assembly adjacent the discharge opening of the fan including a first door configured to pivot about a first axis having a first section and a second section wherein the first section pivots to an open position separately from the second section and a second door configured to pivot about a second axis having a first section and a second section, wherein the first section pivots to an open position separately from the second section, and wherein when the fan is deactivated, the doors are in a closed position and the damper assembly covers and seals the discharge opening of the fan;
• b) activating the fan wherein air flow created by the fan contacts the first and second doors and pivots the doors into the open position, wherein the first door pivots in a first direction about the first axis and the second door pivots about the second axis in a second direction opposite from the first direction, and wherein in the open position, the first and second sections of each of the doors are at different angles in response to the air flow;
• and
• c) deactivating the fan so that the doors move to the closed position and seal the discharge opening of the fan.