Broan-NuTone LLC

A backdraft damper for a ventilation fan assembly, the backdraft damper having a main body having a wall defining an inner surface, an outer surface, a first open end and a second open end. An interior space is defined by the main body wall inner surface. A damper door is rotationally coupled to the main body wall and located within the interior space. The damper door defines a perimeter edge and the damper door is configured to rotate between (i) a closed position, in which the perimeter edge is located adjacent to the main body inner surface, and (ii) an open position in which a majority of the perimeter edge is not adjacent to the main body inner surface. A block extends from the main body wall inner surface into the interior space adjacent to the damper door perimeter edge when the damper door is in the closed position and, during operation of the fan assembly, creates an area of high pressure which creates a torque on the damper door.

A ventilation fan is disclosed having a housing with at least one sidewall defining an interior space, an inlet opening into the interior space, and an outlet aperture spaced apart from the inlet. The housing has at least one of a prong and a recess with at least one nail extending away from the at least one of a prong and a recess toward an aperture in the housing. The at least one of a prong and a recess is configured to be deformable to allow the at least one nail to pass through the aperture in the housing.

A ventilating system includes a main housing defining an inlet configured to receive air into the main housing and an outlet configured to allow the air to exit the main housing. The system further includes a fan in the main housing and configured and arranged to generate a flow of air into the main housing through the inlet and from the main housing through the outlet. The system further includes a grille configured to be coupled to the main housing, a plate configured to be coupled to the grille, and a lens coupled to the plate.

A ventilator for a building structure is disclosed. The ventilator has a housing defining (i) a first air flow plenum configured to be fluidly connected to the interior of the building at a first end and the exterior of the building at a second end, and (ii) a second air flow plenum configured to be fluidly connected to the interior of the building at a first end and the exterior of the building at a second end. A core defines portions of each of the first air flow plenum and the second air flow plenum and configured to transfer heat between the first air flow plenum and the second air flow plenum. A first sensor is located in the first air flow plenum to provide a sensed characteristic of the air in the first air flow plenum and a second sensor is located in the second air flow plenum to provide a sensed characteristic of the air in the second air flow plenum. A blower configured to move air through at least one of the first air flow plenum and the second air flow plenum. A switch provides a default designation of which the first air flow plenum and the second air flow plenum carries exhaust air from the interior of the building structure to the exterior of the building structure. A control system obtains readings from the first sensor and the second sensor indicative of a sensed characteristic of the air in the first air flow plenum and the second air flow plenum. The control system is configured to determine, based on the readings from the first sensor and the second sensor, which of the first air flow plenum and the second air flow plenum carries exhaust air from the interior of the building structure to the exterior of the building structure and compare the default designation of the switch to the determination based on the first and second sensors.

An energy-recovery ventilator system is configured to be mounted to a window of a building. The energy-recovery ventilator system includes an energy recovery ventilator configured to exchange air and including an indoor ventilator section arranged to lie on an indoor side of the window, an outdoor ventilator section arranged to lie on an outdoor side of the window, and a ventilator manifold extending between and interconnecting the indoor ventilator section and the outdoor ventilator section.

A fan assembly for a ventilation unit is disclosed wherein the fan assembly has a scroll housing defining a scroll interior and a scroll inlet. The fan assembly also has a collar comprising an outer rim, an inner end and a collar wall extending from the outer rim to the inner end, and the collar outer rim is larger than the collar inner end. The collar is configured to be removably coupled to the scroll housing adjacent to the scroll housing inlet such that the collar wall extends through the scroll inlet to guide air into the scroll interior.

A ventilation fan includes a scroll formed to define an interior space, an inlet opening into the interior space, and an outlet opening into the interior space and spaced apart from the inlet. A fan wheel is coupled to the scroll within the interior space and includes a plurality of fan blades configured to rotate about a vertical rotation axis to draw air into the interior space to ventilate a room positioned adjacent to the ventilation fan. An inlet collar is coupled to an exterior surface of a bottom wall of the scroll and extends through the inlet. The inlet collar has a upper, distal end located above a lower end of each of the plurality of fan blades when the ventilation fan is installed above or adjacent to a ceiling of the building.

A ventilating system includes a main housing defining an inlet configured to receive air into the main housing and an outlet configured to allow the air to exit the main housing. The system further includes a fan in the main housing and configured and arranged to generate a flow of air into the main housing through the inlet and from the main housing through the outlet. The system further includes a grille configured to be coupled to the main housing, a plate configured to be coupled to the grille, and a lens coupled to the plate.

A ventilation fan includes a scroll formed to define an interior space, an inlet opening into the interior space, and an outlet opening into the interior space and spaced apart from the inlet. A fan wheel is coupled to the scroll within the interior space and includes a plurality of fan blades configured to rotate about a vertical rotation axis to draw air into the interior space to ventilate a room positioned adjacent to the ventilation fan. An inlet collar is coupled to an exterior surface of a bottom wall of the scroll and extends through the inlet. The inlet collar has a upper, distal end located above a lower end of each of the plurality of fan blades when the ventilation fan is installed above or adjacent to a ceiling of the building.

A ventilation system in accordance with the present disclosure includes a housing and a core unit arranged in the housing. A fresh air inlet, an exhaust air inlet, a fresh air outlet, and an exhaust air outlet are arranged on the housing. The core unit is arranged between the inlets and outlets to transfer heat and/or humidity between fresh air and exhaust air flowing through the ventilation system. The exhaust air flows through ducting to an exhaust port in a wall of a building structure.