smoke exit air blower

1.It is normally used for ventilation (work at low speed). but for smoke-extracting when it is to protect fire (work at high speed).2.The dual-function fan has two ways in installing: horizontal and vertical.3.It''s widely used for fire-protection expiration and ventilation of high-building, underground garage, and tunnel.4.Model:I/II/series total 25 models.5.Air volume: 3410-93800m3/h. 6..Total pressure: 200-1360Pa .

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