An air moving device includes a housing member, an impeller assembly, and a nozzle assembly. The nozzle assembly can include one or more angled vanes set an angle with respect to a central axis of the air moving device. The air moving device can output a column of moving air having an oblong and/or rectangular cross-section. A dispersion pattern of the column of moving air upon the floor of an enclosure in which the air moving device is installed can have an oblong and/or rectangular shape. The dimensions of the dispersion pattern may be varied by moving the air moving device toward or away from the floor, and/or by changing the angles of the stator vanes within the nozzle assembly.

Apparatus, systems and methods of 80/90 CFM ventilation exhaust fans for bathrooms with telescoping side extension brackets and side by side electric driven motor and blower wheel, and being used with or without lights. The exhaust fans can include a single main housing, that allows for a blower housing to support the motor and a blower wheel in a side by side arrangement. The exhaust fans can further include an outside wiring box that is externally located to the main housing. The wiring box can have support male plugs and female receptacles for supplying an electrical power supply to the electric motor and light. The side extension brackets can include telescoping members that allow the exhaust fans to be easily attached to structural members inside of a ceiling so that the exhaust fan has a vent cover attached to the ceiling. Inside of the exhaust fans can be light box with closed sides and bottom which prevents incoming air from passing directly onto the lights. Instead incoming air is drawn to pass around the outside of the light box so that the light box functions as a heat sink reducing the heat generated from the light.

A modular fan housing configured to hold an array of motors and fans is provided. The modular fan housing is configured for use in an air-handling system that delivers air to a ventilation system for at least a portion of a building. The fan housing comprises a plurality of modular units configured to be stacked adjacent to one another in at least one row or column to form an array. The modular units each include an interior surface and have a front end and a back end that define a chamber. The chambers are configured to receive the motors and fans. Sound attenuation layers extend along at least a portion of the interior surface of the corresponding chambers. The sound attenuation layers are positioned between at least some of the adjacent chambers.

The invention relates to a method for measuring pressure differences in different premises of a building, in which the pressure difference is measured by means of one or more sensors (2) that measure absolute pressure. The measurement results obtained from the sensors (2) are combined with information on the efficiency of the ventilation of the building, and the pressure difference caused by ventilation is mathematically separated from the measurement result by making use of information on the ventilation efficiency at any one time.

An illumination device and a ventilator with a light are disclosed. The ventilator includes: a fan electrically connecting to a power transmitting port to be driven for generating an airflow; a light for transferring electrical power into light; a power storage module electrically connecting with the light and the power transmitting port; and a control unit electrically connecting with the power storage module and the power transmitting port, wherein the control unit determines whether the power transmitting port provides electrical power, the control unit controls the power storage module to store electrical power sourced from the power transmitting port if a result of the determination is positive, and the control unit controls the power storage module to output electrical power stored therein to the light if the result of the determination is negative.

An air exhaust apparatus includes a housing, a shaft, a bearing part, a propeller, and an impeller disposed at a lower portion of the shaft. The housing has a space formed therein and an outlet formed at an upper portion thereof to discharge air flowed into the space. The shaft is installed inside of the housing in a vertical direction. The bearing part supports the shaft to revolve. The propeller is disposed at an upper portion of the shaft to be rotated by an exhaust suction flow in a duct. The impeller includes a rotating plate having a through hole for air inlet and a plurality of fins formed on the rotating plate, and is rotated with the propeller. A funnel-shaped vortex is formed under the impeller when the propeller and impeller revolve.

A disclosed fan system includes a housing having side walls, an inflow side, and an outflow side; a fan secured in the housing by a mounting; and a backflow blocker mounted to the side walls within the housing on the outflow side of the housing partially blocking a cross-sectional area of the outflow side. The backflow blocker is positioned approximately centrally in a flow path of the housing and is configured to block part of an airflow cross section such that, between side walls of the housing and side walls of the backflow blocker, an annular duct is formed as an air passage. Further, the backflow blocker has a thickness that is greater than 5% of a width of the housing, and is less than 20% of an axial design height of the fan system.

A fresh-air cooling system and methods of cooling a building structure with the same are provided. The system has an exterior interface assembly, a damper, a register, a duct, and a motorized fan. The exterior interface assembly is connected to the register by the duct and provides a flow path for air outside the building to enter the duct. The motorized fan is disposed in an attic of the building structure and pulls air into the attic from a living space to create a negative static pressure in the living space. The damper is positioned along the flow path from the exterior interface assembly to the living space and opens to allow air outside the building structure to enter the living space in response to motorized fan creating in the living space a negative static pressure that exceeds the cracking pressure of the damper. The cracking pressure of the damper can be adjusted to control the flow rate of outside air through the damper.

A ventilation system comprises a ventilation fan with a lamp and a ceiling which has an installation opening. The ventilation fan with the lamp is adapted for installing to the ceiling through the installation opening. The ventilation fan comprises a housing, a fan module, and a lamp module. The housing includes a top plate and a side wall which are connected with each other to form a first opening. The first opening is aligned with the installation opening. The fan module is disposed in the housing. The lamp module is disposed out of the installation opening. The lamp module and the housing are located at opposite sides of the installation opening of the ceiling. The lamp module includes a light source, a base, at least one optical component, a switch and a lamp cover. The optical component and the switch are disposed at the different sides of the base.

A portable variable volume paint spray enclosure or booth includes a frame assembled from longitudinal members and detachable clamps. The clamps secure together adjacent ends of the longitudinal members. The paint spray enclosure further includes a flexible cover disposed upon the frame such that a relatively air tight enclosure having a predetermined configuration is formed. The assembled frame and flexible cover extends from grade level to a predetermined elevation to encase an object to be painted. The paint spray enclosure also includes an air flow input apparatus for allowing air flow into the enclosure, and an air extraction apparatus/air scrubber for removing air from the enclosure, such that air mixed with vaporized paint inside the enclosure is removed from the enclosure before the paint vapor and air combine to form an explosive mixture, thereby preventing an explosion and/or fire from occurring inside the enclosure, and preventing operators from being exposed to harmful fumes. The air scrubber removes the paint vapor from the air as the combination exits the enclosure, thereby allowing only “clean” air back into the atmosphere.