Ventilation systems are disclosed that include a base unit having a mounting platform connecting the base unit to a surface. Such base units have a base collar that extends away from the mounting platform and forms a perimeter of a opening through the base unit. Such ventilation systems include a fan unit that has a fan housing and a fan. The fan housing is configured to receive air through an inlet and expel air through an outlet, and the fan is capable of moving air from the inlet to the outlet. Such ventilation systems also include a quick connect interface that has a base feature and a fan housing feature. The base feature is integrated into the base unit, and the fan housing feature integrated into the fan unit; both are capable of detachably connecting together to secure the fan unit to the base unit.

A heating, ventilation, and/or air conditioning (HVAC) unit includes an air flow amplifier coupled to a fan deck of the HVAC unit. The air flow amplifier includes a ring having an annular cavity and an air flow inlet formed in the ring. The air flow inlet is configured to direct an air flow into the annular cavity. The air flow amplifier also includes a first annular air flow outlet formed in the ring and configured to direct a first portion of the air flow out of the annular cavity and along an inner diameter of the ring. The air flow amplifier further includes a second annular air flow outlet formed in the ring and configured to direct a second portion of the air flow out of the annular cavity and along the inner diameter of the ring.

A hinge assembly includes a pair of lower mounting brackets, at least two upper hinge leaves, and an axle pivotally coupling the upper hinge leaves to the lower mounting brackets. Each lower mounting bracket has a vertically oval-shaped axle hole. Each upper hinge leaf includes a U-shaped mounting member and a hook shaped clamping plate coupled to the U-shaped mounting member through threaded tension bolts. The upper hinge leaf also has a pair of axle holes. The axle extends through the elongated axle holes of the lower mounting bracket vertical flange and through the axle holes of the U-shaped member.

A bottom-mounted whole house fan assembly includes an intake plenum mounted over an opening in a ceiling of a building. The intake plenum is supported on the ceiling in the attic of the building. One end of a flexible duct is connected to the intake plenum and the other end of the duct is connected to a fan so that the fan draws air in the building through the intake plenum and duct and exhausts the air in the attic from whence the air is vented to atmosphere. The fan is supported by at least one vertical strut that is connected to the ceiling at the lower end of the strut and to a housing of the fan at the upper end of the strut. A sound dampener is interposed between the strut and the fan housing and/or the ceiling beam to which the strut is attached.

In a roof window system, the housing (6) of the ventilation unit (5) is prepared for accommodation of a standard ventilator and/or a regenerator allowing an air current through a ventilation passage (28), from an exterior grating (18) to a ventilation panel (3) integrated into or in continuation of a lining panel of a room in the interior of the building in which the roof window is installed.

According to an aspect of this disclosure, a ventilation and lighting system including a main housing having an inlet opening and a discharge opening, a blower and motor assembly disposed within a housing and operable to move air through the inlet and outlet, a grille configured to be located at the inlet opening, the grille having a cavity and a plate defining a plurality of apertures through which air may move, and one or more lighting elements arranged within the cavity and an optical component covering the cavity. The system is arranged such that light developed by the one or more lighting elements mixes within the cavity and transmits through the optical component covering the cavity, and the system further includes a controller that coordinates operation of the blower and motor assembly and the one or more lighting elements from a remote location.

An attic ventilation system including a fan assembly, a power source assembly and an attic assembly is disclosed herein. The fan assembly includes fan blades, a fan housing and a motor, the fan housing covers the fan blades. The motor makes the blades rotate. The fan housing is attached to a window frame of an attic assembly by support bars. The power source assembly includes a solar panel attached to a support frame. The support frame is attached to the window frame by top support bars and bottom support bars. The top support bars are larger than the bottom support bars. The solar panel has an inclination to face a sun path. The solar panel supplies power energy to the motor. The fan assembly blows fresh air to an interior of an attic assembly.

The attic hot air recirculation system is mechanical system. The attic hot air recirculation system is configured for use with an HVAC system of a building. The attic hot air recirculation system is energy saving technology. The attic hot air recirculation system captures solar energy from the roof of the building. The attic hot air recirculation system monitors the temperature of the captured solar energy and the temperature of a chamber in the building. The attic hot air recirculation system uses the heat generated from the captured solar energy to heat a chamber in the room. When the temperature difference between the temperature of the captured solar energy and the temperature of a chamber in the building makes it thermodynamically favorable to do so, the attic hot air recirculation system transfers heat from the roof into the chamber.

An automated cooling system and method for energy efficient use with a building structure by adjusting operational parameters is provided. The automated cooling system can adjust operational parameters in response to conditions (e.g., temperature, humidity) detected by sensors located at one or more strategically selected locations inside or outside the building structure. The automated cooling system can ramp speeds of a motor that rotates fan blades in response to changes in the air temperature in the building structure so as to maintain a desired temperature without switching on and off the motor to preserve fan blade inertia.

A nozzle assembly for a fan unit includes an inner nozzle having a tapered outer diameter and a flow path radially inward from the tapered outer diameter with respect to a longitudinal axis of the nozzle assembly. The flow path is configured to guide a fluid flow and to expel the fluid flow through an inner outlet of the inner nozzle to a surrounding environment. The nozzle assembly also includes an outer nozzle disposed radially outward from the inner nozzle with respect to the longitudinal axis. The outer nozzle and the tapered outer diameter of the inner nozzle define an annular flow path therebetween. The annular flow path is configured to guide the fluid flow and to expel the fluid flow to the surrounding environment through an outer outlet of the outer nozzle. A cross-sectional area of the outer outlet is adjustable via movement of the inner nozzle, the outer nozzle, or both along the longitudinal axis of the nozzle assembly.