An indoor air quality (IAQ) system for a building includes an IAQ sensor that is located within the building and that is configured to measure an IAQ parameter. The IAQ parameter is one of: an amount of particulate of at least a predetermined size present in air; an amount of volatile organic compounds (VOCs) present in air; and an amount of carbon dioxide present in air. A mitigation module is configured to: selectively turn on a mitigation device based on a comparison of the IAQ parameter with a first ON threshold and a second ON threshold; and selectively turn off the mitigation device based on a comparison of the IAQ parameter with an OFF threshold. A clean module is configured to determine a clean value for the IAQ parameter. A thresholds module is configured to, based on the clean value, determine the first ON threshold and the OFF threshold.

An indoor air quality (IAQ) system for a building includes an IAQ sensor that is located within the building and that is configured to measure an IAQ parameter. The IAQ parameter is one of: an amount of particulate of at least a predetermined size present in air; an amount of volatile organic compounds (VOCs) present in air; and an amount of carbon dioxide present in air. A mitigation module is configured to: selectively turn on a mitigation device based on a comparison of the IAQ parameter with a first ON threshold and a second ON threshold; and selectively turn off the mitigation device based on a comparison of the IAQ parameter with an OFF threshold. A clean module is configured to determine a clean value for the IAQ parameter. A thresholds module is configured to, based on the clean value, determine the first ON threshold and the OFF threshold.

A ventilation device to be installed outdoors, includes: a casing; a heat exchanger accommodated in the casing and configured to perform heat exchange between outdoor air flowing indoors and indoor air flowing outdoors; an electric component unit including a control board and accommodated in the casing; and a fastener fixing, to the casing, an electric wire connected to the electric component unit. The heat exchanger is extractable sideward from the casing. The electric component unit is disposed above a projection region of the heat exchanger extracted from the casing. The casing includes a lead-out port disposed below the projection region and through which the electric wire is led out of the casing. The fastener is disposed between the electric component unit and the lead-out port. The electric wire fixed by the fastener is routed around the projection region.

A ventilation device to be installed outdoors, includes: a casing; a heat exchanger accommodated in the casing and configured to perform heat exchange between outdoor air flowing indoors and indoor air flowing outdoors; an electric component unit including a control board and accommodated in the casing; and a fastener fixing, to the casing, an electric wire connected to the electric component unit. The heat exchanger is extractable sideward from the casing. The electric component unit is disposed above a projection region of the heat exchanger extracted from the casing. The casing includes a lead-out port disposed below the projection region and through which the electric wire is led out of the casing. The fastener is disposed between the electric component unit and the lead-out port. The electric wire fixed by the fastener is routed around the projection region.

Automatic house vent is a house vent system that automatically closes all house vents when electrical power is shut off to the house. Automatic house vent is a fire prevention mechanism that closes all house vents in order to prevent burning ambers from entering the house through a house vent and starting a fire from the inside of the house. It is standard procedure during forest fires for the authorities to shut off electrical power to communities in the path of the fire. Each house vent is mechanically opened and closed by an electric solenoid actuator that is connected by electrical wiring to a special circuit breaker located in the house electrical panel or breaker box.

Automatic house vent is a house vent system that automatically closes all house vents when electrical power is shut off to the house. Automatic house vent is a fire prevention mechanism that closes all house vents in order to prevent burning ambers from entering the house through a house vent and starting a fire from the inside of the house. It is standard procedure during forest fires for the authorities to shut off electrical power to communities in the path of the fire. Each house vent is mechanically opened and closed by an electric solenoid actuator that is connected by electrical wiring to a special circuit breaker located in the house electrical panel or breaker box.

Automatic house vent is a house vent system that automatically closes all house vents when electrical power is shut off to the house. Automatic house vent is a fire prevention mechanism that closes all house vents in order to prevent burning ambers from entering the house through a house vent and starting a fire from the inside of the house. It is standard procedure during forest fires for the authorities to shut off electrical power to communities in the path of the fire. Each house vent is mechanically opened and closed by an electric solenoid actuator that is connected by electrical wiring to a special circuit breaker located in the house electrical panel or breaker box.

Automatic house vent is a house vent system that automatically closes all house vents when electrical power is shut off to the house. Automatic house vent is a fire prevention mechanism that closes all house vents in order to prevent burning ambers from entering the house through a house vent and starting a fire from the inside of the house. It is standard procedure during forest fires for the authorities to shut off electrical power to communities in the path of the fire. Each house vent is mechanically opened and closed by an electric solenoid actuator that is connected by electrical wiring to a special circuit breaker located in the house electrical panel or breaker box.

Disclosed is an air deflector moving mechanism. The air deflector moving mechanism includes an air deflector (1) and a driving mechanism. The air deflector (1) is in a drive connection with the driving mechanism and moves under a driving action by the driving mechanism. The driving mechanism includes a rotary column (2). A driving groove (3) extending in an axial direction is provided circumferentially on an outer periphery of the rotary column (2). The air deflector (1) is provided with a driving head (4) disposed in the driving groove (3). Also disclosed is an air conditioner including the air deflector moving mechanism.

A filter for an oil catch apparatus is provided. The oil catch apparatus is capable of efficiently extracting oil from air flowing through the oil catch apparatus while being of compact size. The filter includes a cylindrically wound main filter unit, a first keep member for keeping one end of the main filter unit, and a second keep member for keeping the other end of the main filter unit. Air flowing into the main filter unit from an opening formed in the first keep member is cleared of impurities upon passing through the main filter unit, and exits out of the main filter unit.