An indoor unit for an air conditioner in which the water level of a steam generator is linked with the water level of a supply chamber for supplying water to the steam generator, and a supply floater, which is lowered or raised according to the water level of the supply chamber, opens and closes a supply flow channel for supplying water to the supply chamber. The indoor unit for an air conditioner can control the water supply through the level of water stored in the steam generator.

An indoor unit for an air conditioner in which the water level of a steam generator is linked with the water level of a supply chamber for supplying water to the steam generator, and a supply floater, which is lowered or raised according to the water level of the supply chamber, opens and closes a supply flow channel for supplying water to the supply chamber. The indoor unit for an air conditioner can control the water supply through the level of water stored in the steam generator.

In one embodiment, a ventilation control system includes a processor; a memory; a calculation module to calculate an inverse protection factor for a structure using a lumped element model, the inverse protection factor being an inverse of a protection factor which is a ratio of contaminant which the one or more infected individuals exhale in the structure and contaminant which the uninfected individual inhales in the structure; and a ventilation control module to control a ventilation system to modify air flowing in the structure. The inverse protection factor is calculated based on operating parameters of the ventilation system, arrangement of spaces of the structure, and locations and relative positions of the infected and uninfected individuals in the structure with respect to air flowing in the structure and influenced by the ventilation system. The ventilation control module is configured to control the ventilation system based on the calculated inverse protection factor.

A base carrying a left-side panel and a right-side panel. A top panel is disposed on and extends between said side panels, wherein said base, said side panels and top panel define a pet receiving area. A blower unit disposed at a rear side of said pet receiving area drawing air in a direction from a front side to said rear side of the housing across the pet receiving area. An airflow control covering disposed on at least one of said left-side panel and said right-side panel providing a reduced airflow entering said pet receiving area through the side panel relative to a front side of the housing, wherein a negative air pressure is established within the housing while providing a primary airflow direction from said front side to said rear side of the housing to container pet hair, dander and debris within said housing.

The disclosed technology includes devices and systems for an economizer of a heating ventilation and air conditioning (HVAC) system. The disclosed technology can include an economizer for an HVAC system comprising a housing, an air inlet extending through a wall of the housing, a sliding door configured to transition between a closed position and an open position, and a controller configured to cause the sliding door to transition between the closed position and the open position based on temperature data. The sliding door can comprise a first portion forming a barrier and a second portion comprising at least one aperture. In the closed position, the first portion can align with the air inlet and substantially prevent ambient air from moving through the air inlet. In the open position, the second portion can align with the air inlet and permit the ambient air to move through the air inlet.

A magnetic resonance system has an air suction apparatus configured and arranged so as to suck air exhaled by a patient examined by the MR system. A method for operating the MR system is also provided, with which air exhaled by a patient examined by the MR system is sucked in.

An air conditioning control system includes a casing including paths through which air passes, dampers arranged at an entrance and an exit of each of the paths and operated to open or close the entrance and the exit according to a control signal, a heat and mass exchanger including a hygroscopic material for absorbing moisture and arranged across the paths to be rotated with respect to the casing, a driving unit rotating the heat and mass exchanger, a heat exchange unit having a heat transfer medium flowing inside the heat exchange unit and arranged on at least one of the paths, and a controller opening or closing the entrance and the exit of the paths by applying a control signal to the dampers, and changing a rotation speed of the heat and mass exchanger by applying a control signal to the driving unit, according to operation modes.

An exhaust fan for a space is provided. The exhaust fan includes a vent and a plurality of blades. The exhaust fan further includes a fan motor operatively coupled to the plurality of fan blades. The fan motor is configured to drive rotation of the plurality of fan blades to draw air within the space through the vent. The exhaust fan includes a microphone and a sensor. The sensor is configured to detect one or more parameters of the air. The exhaust fan further includes one or more control devices. The one or more control devices are configured to obtain, via the one or more microphones, audio data indicative of one or more voice commands associated with controlling operation of the fan motor. The one or more control devices are further configured to control operation of the fan motor based, at least in part, on the audio data.

A system is provided that improves basement sustainability in regards to a building's sub-ground level foundation hydrostatic pressure modulation, waterproofing and interior air control and that yields sustained clean and dry interior space.

An upper floater type humidifier which integrates a floater to a water tank is provided. The humidifier includes a water tank and a base. A bottom of the water tank is provided with a drain hole, the drain hole is internally provided with a drain valve, and the base is internally provided with an atomizing water channel. The humidifier further includes a floater, the floater is a floating lever, and one end of the floater is a control end capable of driving the drain valve and the other end of the floater is a floating end. The floater is mounted at the bottom of the water tank via a displacement driving rack to form an upper floater type structure. The floater is mounted on the base of the water tank, the structure in the atomizing water channel is simplified, the cleaning difficulty of the atomizing water channel is reduced.