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![Envelope Filters](https://images.findtheneedle.co.uk/findtheneedle/products/1842512.jpg)
The size 50 - 1100 range of envelope filters is designed to cater for the most common dust problems, which usually involve a ducted system. Larger systems utilise a number of units in a modular form, or other types of filter from our range
For more information on Envelope Filters talk to Dustair Ltd
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