A ventilator includes a first louver, second louvers, side walls, a first inclined member, and a convex part. The first inclined member is inclined so that an opening area widens from the upstream side to a downstream side. The first inclined member has a vertex of inclination in a cross-sectional view that is positioned at the upstream side. The convex part is arranged adjacent at the upstream side in the airflow direction to the vertex. In a maximum angle state in which the first louver is rotated so that an upstream end part of the first louver is closest to the first inclined member, the upstream end part is positioned further to the downstream side in the airflow direction than the vertex. The convex part projects further to an inside of the flow path than the vertex, and extends across the second louvers when seen along the airflow direction.

Disclosed is an air mix valve including: a wall having at least three openings; and at least one airflow-regulating device. The airflow-regulating device includes: at least two shutters placed in the internal volume of the valve, at least one aerodynamic shutter of which is arranged with respect to one of the openings so as to be able to receive an airflow passing through this opening, and a linking mechanism between at least two shutters. Each of the shutters is arranged and guided so as to be able to be caused to move with respect to the wall. At least one airflow-regulating device, named aero-controlled regulation device, is mounted to be freely movable under the effect of aerodynamic energy from airflows passing through the openings.

A Fluid Flow Control System (FFCS) door assembly includes a continuous belt and a plurality of rollers. The plurality of rollers support the continuous belt and define a first segment, a second segment, a third segment, and a fourth segment. The continuous belt includes a plurality of openings that selectively allow fluid flow to pass through the first segment, the second segment, the third segment, and the fourth segment when two openings of the plurality of openings align with the first segment, the second segment, the third segment, or the fourth segment.

In order to carry out, in a heating operation, an airflow rate adjusting operation in which a reduced amount of conditioned air is blown in one or more of a plurality of blowing directions to increase a blowing speed in the rest of the blowing directions, an operation control section is configured to control the flow of the conditioned air such that the conditioned air is blown out in a horizontal blow mode in the blowing direction in which the blowing speed is increased by the airflow rate adjusting operation, and periodically change the blowing direction in which a reduced amount of the conditioned air is blown. As a result, temperature variations in the air-conditioning target space in the heating operation are reduced.

Device and method for a UV air sanitizer with boundlessly-extended sanitizing chamber are provided. The device comprises an enclosure with an inlet emitter area with directional louvers. The inlet emitter area optimized for drawing in outside air stream, while simultaneously emitting ultraviolet germicidal radiation into said outside air stream. The device further comprises a fan and a disinfection unit with at least one UV lamp. The UV lamp is uniquely positioned and directed inside the enclosure, so as to simultaneously irradiate: air moving inside the enclosure, air entering through the inlet emitter area, as well as a moving stream of air, said air located outside of the enclosure and drawn toward the inlet area by the fan. The method includes the steps required to use the device for creation of one or multiple germicidally-protective defensive air curtains.

A valved cover is described for controlling air flow through perforated-strip-type soffit vents surrounding houses. The narrow, continuous vents are completely enclosed except for valved portholes in the cover, the flap valves being stiffly hinged to stay open (and quiet) in most weather to allow two-way ventilating air flow between outdoors and attic/roof space. The valved covers “harness” very strong winds: those on the the windward have their valves blown closed, blocking potentially destructive wind/rain entry into the attic/roof space, while those facing lee sides remain open so that the attic/roofspace is connected only to the wind-depressurized lee-side air and is therefore itself depressurized, helping hold the roof envelope together. The valved covers can be factory-mounted on the soffit panels and flat-folded for compact shipping and handling.

An enclosure vent is operable to be mounted to a building that presents an interior space and to move in response to a change in vent temperature. The vent includes a vent frame and a laminated composite vent panel. The vent panel includes outer and inner panel layers and an intermediate connecting structure that connects the panel layers relative to one another along an interface defined between the panel layers. The outer and inner panel layers have, respectively, first and second coefficients of thermal expansion that are different from each other and cause expansion and contraction of the corresponding panel layers along the interface. The connecting structure permits expansion and/or contraction of each panel layer in response to a vent temperature change so that the panel flexes.

An air conditioner indoor unit and an air conditioner are provided. The indoor unit has a surface frame, a breezeless member, a heat exchanger and a fan. A first air outlet is formed in a front lower part of the surface frame. At least one second air outlet is formed on at least one of a left side of the surface frame and a right side of the surface frame. The breezeless member is disposed on a front side of the surface frame and movable between a first position and a second position. When the breezeless member is located at the first position, the first panel opens the first air outlet. When the breezeless member is located at the second position, the first panel closes the first air outlet.

The disclosure relates to a method for operating a ventilation system with a mixing chamber into which air is supplied via a first supply duct and via at least one further supply duct. Air is removed from the mixing chamber by a removal duct. The supply of air—volume control—into the mixing chamber from the supply ducts is controlled in each case via flaps with a plurality of flap leaves and/or a plurality of flap units each having a plurality of intercoupled flap leaves. According to the disclosure, the flap leaves and/or the flap units are activated individually, and an individual opening position of the respective flap leaves or of the flap units with the flap leaves is made possible.

A grille assembly having a housing includes a corridor between a first end and a second end of the housing. The grille assembly includes a core disposed within the corridor and having a plurality of blades that guide fluid flow through the housing. A first portion of the plurality of blades is slanted in a first direction at a first non-perpendicular angle relative to a corridor axis. The grille assembly also includes a second portion of the plurality of blades slanted in a second direction that is substantially opposite the first direction at a second non-perpendicular angle relative to the corridor axis. The core obstructs a line of sight from the first end to the second end of the housing.