I would like to ask the office to add exhaust fans
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This post was last edited by li*ch1968 on 2011-5-16 at 19:43. Due to the large number of people, the air quality is a bit poor. I hope a few more exhaust fans can be added. Please suggest some suppliers or models that have been used by experienced users: Requirements: low noise level; preferably a damper that is connected to the fan (if not available, then manual operation of the louvers will have to be used); no special requirements regarding air volume; ideally, it should operate on 220V two-phase power supply; dimensions should be less than 500X500.
It is possible to add more, but you need to consider whether it will be too hot in hot weather, as the amount of fresh air will then be too large