Multi-component whole house fan system

A method for ventilating a building structure, comprising:

• activating an exhaust assembly that extends through an exterior substrate of a building structure to actively direct, via an impeller, an initial flow of exhaust air from an unconditioned space of the building structure to an exterior environment, the unconditioned space separated from a conditioned space of the building structure via an interior substrate through which a damper assembly extends having a moveable door in a closed position;
• monitoring, via a pressure sensor, a differential pressure between the unconditioned space and the conditioned space;
• and
• subsequently transitioning, via a control signal from a control circuit coupled to the environmental sensor, the moveable door of the damper assembly from the closed position to an open position responsive to the differential pressure reaching a predetermined threshold to generate a combined flow of exhaust air from the conditioned space, through the damper assembly, through the unconditioned space, and through the exhaust assembly to the exterior of the building structure.

Apparatus comprising:

• a damper assembly configured to be coupled to an opening extending through a first substrate separating a conditioned space and an unconditioned space in a building structure, the damper assembly comprising an interior door moveable between a closed position and an open position, wherein in the closed position the interior door seals off the conditioned space from the unconditioned space and in the open position fluidic communication is established through the aperture in the first substrate between the conditioned space and the unconditioned space;
• an exhaust assembly configured to extend through a second substrate separating the unconditioned space and an exterior of the building structure, the exhaust assembly comprising an electric motor configured to rotate an impeller;
• a pressure sensor configured to sense a first pressure of the unconditioned space and a second pressure of the conditioned space;
• and
• a controller configured to activate the exhaust assembly to generate an initial flow of exhaust air from the unconditioned space to the exterior of the building structure while the interior door of the damper assembly is in the closed position, and to subsequently transition the interior door of the damper assembly to the open position responsive to a determination that the second pressure exceeds the first pressure by a predetermined pressure interval.