noun
air damper; draft regulator
A device in a chimney or ventilation system that controls airflow. Technical term used in architecture and traditional heating.
煙突に風戸を取り付けて、空気の流れを調節する。
An air damper is installed in the chimney to regulate the airflow.
noun
wind door; ventilation door
Archaic term for a door or opening designed to let wind pass through, often to cool a room. Not used in modern Japanese.
昔の家では、夏に風戸を開けて涼をとった。
In old houses, they opened the wind door in summer to cool the room.