Military Filter Units have been manufactured and supplied for a number of military and fighting vehicles. These filters have all been specifically designed to provide high performance odour, vapour and particle removal whilst also meeting the very stringent criteria laid down by designers and specifiers. Such criteria include weight restrictions, minimum service life requirements, access and size limitations, shock resistance, performance testing at the factory and on site and ensuring that only carefully approved materials are used in the filter construction. These filters are frequently subjected to high contaminant loadings and for seaborne applications can be manufactured with weather cowls for mounting on exposed decks.