| 摘要 |
A ventilation system for a room 2 has an extract vent 30 with a filter 31 located in a warm region and connected with an adjacent inlet vent 46 via a fan 33 and a heat recovery unit 41. Air extracted from the warm region is filtered, cooled and returned to the same region. A duct 50 extends from outside the room 2 to a second region in the room remote from the first region and is coupled with the heat recovery unit 41. Cool air from outside the room is thereby warmed by the heat extracted from the warm region and this warmed, fresh air is supplied to the second region. A parallel plate heat recovery unit is used, where one or both sides of each plate is formed with an array of dimples to promote heat transfer. |
