| 摘要 |
A total heat exchanger unit (1) includes a controller (2) for, upon receipt of a stop signal for stopping optional ventilation operation, terminating the optional ventilation operation and starting forced ventilation operation, and upon receipt of a start signal for starting the optional ventilation operation, terminating the forced ventilation operation and starting the optional ventilation operation. The controller (2) allows intermittent operation of an air supply fan (20) and an exhaust fan (21) during the forced ventilation operation. |
