A system for use with a manhole vault having an internal atmosphere, and, optionally, with a ventilation stack connecting the vault to an external atmosphere. The system includes a manhole cover, a ventilation pipe, and an air moving assembly. The cover has one or more through-holes extending between top and bottom surfaces. Each of the through-hole(s) is in fluid communication with the external atmosphere at the top surface. The pipe has a through-channel that extends between first and second openings. The first opening is positioned proximal to either an opening into the ventilation stack or at least one of the through-hole(s) at the bottom surface of the cover. The second opening is positioned in the interior of the vault. The device is configured to cause a portion of one of the interior and external atmospheres to flow through the through-channel toward a different one of the interior and external atmospheres.

A control system for a HVAC system for a structure and including a blower that flows air over an indoor heat exchanger. The control system may include a first input device, a first sensor, and a processor in electronic communication with the first input device, the first sensor, and the blower of the HVAC system. The first input device may be operable to accept a zoning mode selection. The first sensor may be sensor operable to measure a first temperature at a first location within the structure. The processor may be programmed to determine a cooling or heating demand on the HVAC system based on an input temperature and the first measured temperature. The processor may be further programmed to adjust an air flow rate produced by the blower based on the demand on the HVAC system and the zoning mode selection.

A control system for a HVAC system for a structure and including a blower that flows air over an indoor heat exchanger. The control system may include a first input device, a first sensor, and a processor in electronic communication with the first input device, the first sensor, and the blower of the HVAC system. The first input device may be operable to accept a zoning mode selection. The first sensor may be sensor operable to measure a first temperature at a first location within the structure. The processor may be programmed to determine a cooling or heating demand on the HVAC system based on an input temperature and the first measured temperature. The processor may be further programmed to adjust an air flow rate produced by the blower based on the demand on the HVAC system and the zoning mode selection.

The object of this invention is a ventilation duct unit (1), which comprises an inlet (2), an outlet (3), a flow channel (4), which extends from the inlet to the outlet, and which is delimited by a wall (5) between the inlet and the outlet, a closing part (6), which is arranged into the flow channel, and which in open position enables flow in the flow channel (4), and in closed position prevents flow in the flow channel, and a closing member (12), which as a response to detecting fire, sets the closing part (6) to a predetermined position. In order to test the functioning of the closing part of the ventilation duct unit simply, easily and quickly in case of fire, the ventilation duct unit comprises a position switch (20) of the closing part (6), which is in first state, when the closing part (6) is in said predetermined position, and which is in second state, when the closing part (6) is not in said predetermined position, and a fire testing unit (21), which at predetermined times triggers testing of the fire safety functions, wherein the closing member (12) sets the closing part (6) to said predetermined position, and which after triggering testing of the fire safety functions indicates that testing of the fire safety function was successful, if it detects that the position switch (20) of the closing part (6) is in first state.

The object of this invention is a ventilation duct unit (1), which comprises an inlet (2), an outlet (3), a flow channel (4), which extends from the inlet to the outlet, and which is delimited by a wall (5) between the inlet and the outlet, a closing part (6), which is arranged into the flow channel, and which in open position enables flow in the flow channel (4), and in closed position prevents flow in the flow channel, and a closing member (12), which as a response to detecting fire, sets the closing part (6) to a predetermined position. In order to test the functioning of the closing part of the ventilation duct unit simply, easily and quickly in case of fire, the ventilation duct unit comprises a position switch (20) of the closing part (6), which is in first state, when the closing part (6) is in said predetermined position, and which is in second state, when the closing part (6) is not in said predetermined position, and a fire testing unit (21), which at predetermined times triggers testing of the fire safety functions, wherein the closing member (12) sets the closing part (6) to said predetermined position, and which after triggering testing of the fire safety functions indicates that testing of the fire safety function was successful, if it detects that the position switch (20) of the closing part (6) is in first state.

A ventilation unit is for ventilating an indoor space, and incorporates an air cleaning device and mechanical restrictor for controlling a restriction to a flow resulting from a pressure differential across the unit. There is determination of the inside and outside air pressures in the vicinity of the unit and of air quality parameters inside and outside. The air cleaning device and the mechanical restrictor are controlled in dependence on the determined air pressures and air quality parameters. This provides a fan-less, and hence low-power ventilation unit, which relies on throttling the natural air flow across the unit to provide flow control, and hence enable control of air quality. The air cleaning device may be operated only when the flow is into the inside space, saving power.

An air conditioner according to the present invention includes: an air flow path through which air flows; a temperature control unit that controls a temperature of air in the air flow path; a humidifier capable of supplying vapor to the air flow path; a blower that has a suction port connected to a downstream opening of the air flow path, and a discharge port from which air sucked from the suction port is discharged; a chamber that has a communication port connected to the discharge port, and a plurality of duct connection ports configured to be connectable to ducts so as to let out air coming from the discharge port through the ducts; and a baffle plate part 8 disposed in the chamber, the baffle plate part overlapping at least partly with the discharge port when seen along a flow direction of air passing through the discharge port.

An air conditioner according to the present invention includes: an air flow path through which air flows; a temperature control unit that controls a temperature of air in the air flow path; a humidifier capable of supplying vapor to the air flow path; a blower that has a suction port connected to a downstream opening of the air flow path, and a discharge port from which air sucked from the suction port is discharged; a chamber that has a communication port connected to the discharge port, and a plurality of duct connection ports configured to be connectable to ducts so as to let out air coming from the discharge port through the ducts; and a baffle plate part 8 disposed in the chamber, the baffle plate part overlapping at least partly with the discharge port when seen along a flow direction of air passing through the discharge port.

Proposed is an air conditioning facility for preventing spread of an infectious disease, the air conditioning facility including a first chamber having a plurality of air discharge holes configured to allow air processed by an air conditioner to be discharged toward an indoor space, an air suction pipe connected to the indoor space and a suction hole of the air conditioner and having a suction end configured to allow air to be suctioned from the indoor space; and an ultraviolet light irradiation unit disposed on a path in which air suctioned from the air suction pipe is discharged through the air discharge holes and configured to emit UV light for sterilization.

An air duct device and an air handling apparatus are provided. The air duct device can include a housing, a first air duct, and a second air duct. The first air duct is arranged in the housing and has an air input end and an air output end. The second air duct is arranged in the housing and has an air input end and an air output end. The air input end of the second air duct passes by the air output end of the first air duct.