In order to help to protect both the primary filter and the HEPA filter within our air movers, we have designed moisture filters for both our AstroAir A50, N50, A25 and N25, which can be attached to the negative pressure units (NPU) when they are being used within a wet blasting environment.

The Moisture Filter prolongs the life of the NPU by preventing moisture entering the pre-filter and the unit itself. This delivers cost savings by reducing the number of pre-filters required, prevents premature damage to the HEPA filter and protects the integral parts of the air mover when operating it in a wet environment.