| 摘要 |
<p>The invention relates to a ventilation plant comprising fans for distribution of intake air and exhaust air in branch ducts (9, 19) having openings (10, 20) for the intake air and exhaust air. Tubular filters (11, 21) are sealingly attached to the openings and create a pressure drop of about 200 Pascal, which filters at flow velocities adjusted to about 2-5 m/sec. are acting also as throttling and sound damping devices of the plant.</p> |
