HDT has the products and the experience to protect your personnel at your mission location. In the unfortunate event of a release of toxic chemicals, the only effective protection is a collective protection system specifically designed to remove CBRN agents from the air supply. These systems protect personnel by supplying filtered outdoor air and overpressurization of the space. Outdoor air must be filtered to provide protection against agents released externally (i.e. toxic clouds). HDT air purification products provide effective protection with safe, clean and breathable air.