HEPA NPU Pre Filter

NPU (Negative Pressure air filtration Unit) HEPA filters are designed to help protect the primary and HEPA filters when used in the removal of Asbestos from the air.

The filters are constructed using a thermally bonded synthetic non-woven media which is then formed into pleats which allow an extended filter area to be presented to the airflow.

The pleats are sealed into a robust spunbond frame using hotmelt which ensures a 100% seal at the filter edge. In addition, a hotmelt pleat fix is placed to ensure filter stability and further add to the filters strength.

The filters are ideally suited to site situations where rough handling can take place as they can run at high airflows and are not prone to collapse or burst.

These filters have been specially adapted for use in Negative Pressure Units.

Classified as EN1822:H13 / ISO 35H

Please note we manufacture a large variety of sizes and depths so please ask for your required dimensions. May take 3-4 weeks before dispatch.