A manifold assembly includes a body and a damper assembly. The body defines a first opening, a second opening, outlet third opening, and a fluid plenum. The fluid plenum fluidly couples the first opening, the second opening, and the third opening. The damper assembly includes a first damper, a second damper, and a connecting member. The first damper is disposed within the fluid plenum proximate to the first opening. The second damper is disposed within the fluid plenum proximate to the second opening. The connecting member is coupled to both the first damper and the second damper and is configured to move the first damper and the second damper to selectively open one of the first opening or the second opening while closing the one not opened.

A method of controlling indoor air humidity includes determining a dew point set point and determining a dew point of air from a space within a building. The method also includes, in response to determining that the dew point satisfies the dew point set point, determining a vent air dew point of air in an external environment surrounding the building. The method further includes, in response to determining that the vent air dew point is below the dew point set point by a dew point threshold, controlling a connecting member of a damper assembly to position a first damper of the damper assembly in an open position to draw in vent air from the external environment into the space, and to position a second damper of the damper assembly in a close position to substantially prevent recirculation of air through the dehumidifier.

An air-conditioning apparatus has an airflow direction deflector having a shaft located in a second airflow passage extending from a heat exchanger to an air outlet of an outer panel, the shaft being connected to a vane and an airflow speed reducer provided between the heat exchanger and the shaft in the second airflow passage. The airflow speed reducer is spaced apart from a first airflow passage wall located between a first airflow passage extending from an air inlet of the outer panel to the heat exchanger and the second airflow passage. The airflow moves between the airflow speed reducer and the shaft at an airflow speed slower than the airflow speed thereof between the heat exchanger and the airflow speed reducer.

In order to efficiently exchange indoor air and outdoor air, to reduce power consumption, and to reduce discomfort to a user, damper, which switches between a heat exchange exhaust air path and a normal ventilation air path, is provided in an exhaust air path. In addition, a discomfort index is calculated from detection results of indoor temperature sensor provided on indoor-side inlet and outdoor temperature sensor provided on outdoor-side inlet. Further, controller, which switches between the heat exchange exhaust air path and the normal ventilation air path so as not to cause discomfort to the user, is provided to control damper.

A ventilation and air conditioning system includes: an air conditioner that cools air in an air conditioning room; a plurality of transfer air fans that are installed for a plurality of rooms, which are independent of the air conditioning room, in one-to-one correspondence and each deliver the air in the air conditioning room to a corresponding room; and a system controller. For each of the plurality of rooms, the system controller calculates a dew point temperature in the room on the basis of the temperature and the humidity in the room, determines, on the basis of the calculated dew point temperature in the room and the temperature in the air conditioning room, the occurrence of condensation resulting from delivery of the air in the air conditioning room to the room, and controls, according to the result of the determination, the airflow of the transfer air fan corresponding to the room.

A system and related method are disclosed for controlling condensation in a space. The system includes a fan and one or more sensors for sensing environmental conditions such as temperature and relative humidity associated with the space and/or objects within the space. For instance, the sensors may sense a surface temperature of an object within the room. The system also includes a controller capable of receiving measurements from the sensor(s) and controlling the fan based on the sensed information. The system may additionally include a heater and/or a damper for transferring outside air into the space, either of which may be controlled by the controller based on the measurements.

Disclosed is a system for conditioning air, the system comprising: a heat exchanger comprising a plurality of heat transfer tubes extending between an accumulation header and an outlet header, an internal volume, and an external surface, wherein an air mover is disposed in fluid communication with an air mover in fluid communication with an air inlet and an air outlet, wherein the air mover is configured to urge a flow of air to be conditioned across the external surface of the heat exchanger, a reactor comprising an adsorbent material, a reactor inlet in fluid communication with the outlet header, and a reactor outlet, a vacuum pump comprising a vacuum pump inlet in fluid communication with the reactor outlet and a vacuum pump outlet in fluid communication with a system exhaust.

A ventilating device including: a frame provided with an air inlet and an air outlet, an air blowing unit for directing air, a control circuit board for controlling the air blowing unit, an operation switch for adjusting a rotating speed of the air blowing unit, and a circuit board box for accommodating the control circuit board. The circuit board box includes: a first accommodating portion in which the operation switch is housed and a second accommodating portion in which the control circuit board is housed. The first accommodating portion includes: a first opening that functions as an operation port; and a panel for covering the first opening. The frame is provided with a second opening opposite to the first opening. The panel is exposed from the second opening to exterior of the frame. A sealing portion is provided around the first opening.

A heating, ventilation and air-conditioning (HVAC) system is provided. The HVAC system includes indoor and outdoor units to condition air of a space, an indoor heat exchanger by which the indoor and outdoor units thermally interact, temperature sensors operably disposed at least at the indoor heat exchanger and in the space and a controller operably coupled to the indoor and outdoor units and configured to control operations of the indoor and outdoor units in accordance with readings of the temperature sensors by reference to space-dew point temperature relationship tables.

A display assembly includes a display box including a base plate having a display portion and a key via hole, an electric control board provided in the display box, and a flexible isolation pad provided in the display box. The flexible isolation pad is located between the base plate and the electric control board, and is configured to isolate the base plate from the electric control board. The display assembly further includes a control key movably provided in the key via hole. The control key is configured to abut against the flexible isolation pad, and to interact with the electric control board through the flexible isolation pad.