| 摘要 |
<p>The invention concerns a device for reduction of build-up of dust and particle deposits in exhaust-air ducts. It comprises a filter (1), which is adapted to be mounted on the side of the exhaust-air device (2) that faces the premises. The filter (1), when in its mounted condition, is visibly available from the premises. The invention also concerns a method of reducing build-up of dust and particle deposits in exhaust-air ducts.</p> |
