Retrofit damper optimized for universal installation

A damper assembly configured for use in a round forced air duct feeding a register vent through a register boot, the damper assembly comprising:

• a damper frame having a frame periphery including an inner frame periphery and an outer frame periphery, the inner frame periphery including a first side and a second side substantially parallel with the first side, the first side and the second side each having a length that is greater than a distance between the first side and the second side, the inner frame periphery defining an air flow aperture;
• a damper blade pivotally secured to the damper frame at a pivot point and pivotable between an open position and a closed position, wherein in the closed position the damper blade seals against the damper frame and substantially blocks air flow through the air flow aperture, wherein in the open position the damper blade does not seal against the damper frame and allows air flow through the air flow aperture, wherein the damper blade includes a blade periphery complementary to the inner frame periphery, and wherein the damper blade is configured to pivot about an axis of rotation extending at least substantially parallel with the first side and the second side of the frame periphery;
• and
• a flexible outer seal extending outwardly from the outer frame periphery, the flexible outer seal being at least substantially circular in order to seal against an inner surface of the round forced air duct when the damper assembly is installed within the round forced air duct.

A damper assembly configured for use in an air duct, the damper assembly comprising:

• a damper frame having a frame periphery including an inner frame periphery and an outer frame periphery, the inner frame periphery including a first side and a second side substantially parallel with the first side, the inner frame periphery defining an air flow aperture;
• a damper blade pivotally secured to the damper frame at a pivot point and pivotable between an open position and a closed position, wherein in the closed position the damper blade seals against the damper frame and substantially blocks air flow through the air flow aperture, wherein in the open position the damper blade does not seal against the damper frame and allows air flow through the air flow aperture, wherein the damper blade includes a blade periphery complementary to the inner frame periphery, and wherein the damper blade is configured to pivot about an axis of rotation extending at least substantially parallel with the first side and the second side of the frame periphery;
• a flexible outer seal extending outwardly from the outer frame periphery, the flexible outer seal being configured to seal against an inner surface of the round forced air duct when the damper assembly is installed within the air duct;
• a damper insert arm pivotally secured to the damper frame and movable between a first configuration in which the damper insert arm is substantially parallel with the damper frame and a second configuration in which the damper insert arm is substantially perpendicular to the damper frame;
• and
• a deployment strap extending from the damper insert arm in a direction parallel with the first side and the second side when the damper insert arm is in the first configuration.