Carbon Monoxide (CO) can be removed from enclosed spaces using palladium impregnated carbons. CFK filter is a specially designed palladium impregnated carbon air cleaning filter suitable for CO removal from submarines and naval ships.

Suracsh filters are the licensed manufacturers of air cleaning for Indian Defense Forces and Paramilitary Forces. With constant R&D and interaction with DRDO, Suracsh filters have made significant improvements in air cleaning filter media using activated carbon.