A ventilation system for ventilating a room, comprising: a lowered ceiling, defining a ceiling space between the lowered ceiling and a ceiling of the room and having an air permeable ceiling surface area; a raised flooring, supported by a support frame and defining a floor space between the raised flooring and a floor of the room, the raised flooring being air permeable over a floor surface area opposite to the air permeable ceiling surface area; an air supply inlet connected to the floor space; and an air outlet, connected to the ceiling space, wherein the air permeability of the raised flooring varies in dependence on distance from the air supply inlet for forming a substantial vertical air flow in which air entering the room through the floor surface area displaces air in the room in the vertical direction and forces air out through the ceiling surface area.

An HVAC system having an airflow path, a primary heat exchanger disposed along the airflow path, wherein the airflow path at least partially passes through the primary heat exchanger, and a multipurpose cabinet selectively configurable between at least a first configuration for housing a first type of auxiliary heat transfer component and a second configuration for housing a second type of auxiliary heat transfer component, wherein the airflow path at least partially passes through the multipurpose cabinet.

An air purifier includes a first case and a second case that are insertably coupled such that the second case slides up and down with respect to the first case. The first case may suction air through a suction space provided at a bottom and a plurality of holes formed in a side wall. The second case may include a discharge grill provided at a top end through which air is discharged and a plurality of holes formed in a side wall through which air is suctioned when the second case is moved down to a first position and through which air is discharged when the second case is moved up to a second position. The top discharge grill may be opened and closed. The second case may also include a side discharge portion formed in the side wall above the plurality of holes. The side discharge portion may be opened and closed.

A heating ventilating and cooling (HVAC) system includes an outdoor air chase having a first end and a second end. The second end of the outdoor air chase is fluidly coupled to a condenser compartment at a location to receive outside air from the condenser compartment and the first end is fluidly coupled to the return air compartment. The outdoor air chase has a conduit through the outdoor air chase. The system includes a configurable flow regulating plate disposed in the outdoor air chase member across the conduit or otherwise across the outdoor airflow that has a plurality of discharge apertures. Initially, the plurality of discharge apertures is covered by a plurality of knockout panels. Each panel is removably secured to the plate. In installation, the installer removes as many of the knockout panels as required for a desired flow of outdoor air. Other systems and methods are presented.

An assembly type ventilation device for windows and doors is disclosed. The assembly type ventilation device for windows and doors comprises: a filter frame provided with an insertion part into which an air filter module is detachably inserted and fixed; a first fixing part installed on one side of the filter frame and fixed to a window; and a second fixing part installed on the other side of the filter frame and fixed to a window frame.

A ventilation assembly having a main housing that can be pre-installed in a wall or ceiling aperture. A fan assembly can be inserted through the aperture and releasably mounted within the main housing. The fan assembly can be removed from the main housing and replaced without removing the main housing from the wall or ceiling. An accessory component can be releasably mounted to the fan assembly either through the aperture when the fan assembly is mounted or prior to installation of the fan assembly.

Modular air handling systems are presented including: at least one blade, where the at least one blade includes: an intake section for receiving an airflow including: an intake air portion, a filter portion, a coil portion, and a head portion; a removable fan module, where the removable fan module includes: at least one low velocity axial fan; and an isolation damper; a discharge section for discharging the airflow including: a discharge air portion; and a number of sensors for receiving process data, discharge data, and environmental data; and a control system for processing data from the number of sensors to provide a closed loop control of the modular air handling system, where each blade operates independently, and where the at least one low velocity axial fan for each removable fan module are controlled by a single control signal.

A modular smart bathroom fan includes a base exhaust fan and one or more modules. The base exhaust fan includes one or more ports that are configured to receive one or more modules. The one or more modules includes a communications module that is configured to communicate with the base exhaust fan and other modules of the one or more modules, receive information from an application or the one or more modules and generate an action to be performed by the base exhaust fan and other modules of the one or more modules.

An insulated cooler unit that produces cooled air is disclosed. The cooler unit includes, within a thermally-insulated housing chamber, an inlet for introducing air to be cooled, an outlet for exiting of cooled air, an air heat exchanger for cooling air, a first fan. The cooler unit additionally includes a first track member having a first channel member, at least one first sliding member configured to slide within the first channel member. The first fan is connected to the first sliding member and is slidably mounted in the first track member by the at least one first sliding member, and is capable of being slidably moved over a portion of a first length of the first track member.

A movable media air handling unit includes cooling media panels that may be moved into or out of an airflow based on whether or not additional cooling is required from the movable cooling media panels. Moving the cooing media panels out of the air flow reduces flow restrictions/pressure drop through the movable media air handling unit. In some embodiments, various types of movable cooling media panels may be used, such as liquid coolant coil panels, gaseous coolant coil panels, evaporative cooling panels, or other types of panels.