Providing leak-free (less than one-half of 1 percent, guaranteed) filter integrity, the improved GlidePack® air filter housings are available in two depths: 13 and 25 inches, said the company. The housings include adapters to accommodate various types and depths of filters. Ribbed tracks allow filters to glide easily into the housing without binding, simplifying filter service, and are available in configurations from four filters high to six filters wide (8-by-12 foot). GlidePack MultiTracks are multiple-stage housings with adaptable tracks for pre-filters and final filters (including gas adsorbers). When upgrades are needed, housings are readily configurable in the field. Features include a polypropylene fin seal filter gasket on each track; high-memory sponge neoprene door-edge gaskets that prevent contaminants from migrating into (or out of) the housing, and poly-sponge door gaskets that prevent filter bypass between the housings and filters. There are two filter service doors, so filters can be serviced from either side of the housing; housing doors are engineered to be square to the housing for a tight filter seal. UV-resistant star-style handles ensure a tight seal, and a new filter seal is established each time air filters are changed.