Abstract: The range hood unit includes a range hood transmitting unit configured to transmit information on an exhaust volume. The heat exchanging ventilation device (1) includes: a heat exchanger receiving unit (19) configured to receive the information from the range hood transmitting unit; and a heat exchanger control unit (17) configured to determine the operation of the heat exchanging ventilation device (1), based on the information received by the heat exchanger receiving unit (19). Based on the exhaust volume of the range hood unit that has been received by the heat exchanger receiving unit (19), the ventilation system exhausts air by subtracting the exhaust volume of the range hood unit from an exhaust volume equivalent to the air supply volume of the heat exchanging ventilation device (1).

Abstract: A total heat exchange device includes: a fan for the exhaust air path which directs air from an indoor exhaust port to an outdoor discharge port through an exhaust air path; another fan for intake air path which directs air from an outdoor suction port to an indoor intake port through an intake air path; and a heat exchange element for exchanging heat between air passing through the exhaust air path and air passing through the intake air path. Also included is a temperature detector for detecting an outdoor temperature and a controller configured to perform a heat exchange mode in which heat is exchanged between air passing through the exhaust air path and air passing through the intake air path or a defrosting mode in which frost on the heat exchange element is thawed, in accordance with the outdoor temperature detected by the temperature detector.

Abstract: The range hood unit includes a range hood transmitting unit configured to transmit information on an exhaust volume. The heat exchanging ventilation device (1) includes: a heat exchanger receiving unit (19) configured to receive the information from the range hood transmitting unit; and a heat exchanger control unit (17) configured to determine the operation of the heat exchanging ventilation device (1), based on the information received by the heat exchanger receiving unit (19). Based on the exhaust volume of the range hood unit that has been received by the heat exchanger receiving unit (19), the ventilation system exhausts air by subtracting the exhaust volume of the range hood unit from an exhaust volume equivalent to the air supply volume of the heat exchanging ventilation device (1).

Abstract: 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.

Abstract: 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.

Abstract: A total heat exchange device is disclosed, which includes: a fan directing air from an indoor exhaust port to an outdoor discharge port through an exhaust air path; a fan directing air from an outdoor suction port to an indoor intake port through an intake air path; and a heat exchange element for exchanging heat between the air passing through the exhaust air path and the air passing through the intake air path. The total heat exchange device further includes a temperature detection section for detecting an outdoor temperature and a control section configured to perform a heat exchange mode in which heat is exchanged between the air passing through the exhaust air path and the air passing through the intake air path or a defrosting mode in which frost on the heat exchange element is thawed, in accordance with the outdoor temperature detected by the temperature detection section.

Abstract: 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.