Aside from cleaning the air, Boysen KNOxOUT is also odor-free, anti-bacterial, and self-cleaning. Through a photocatalytic process, KNOxOUT oxidizes dirt molecules causing them to lose their ability to adhere strongly to surfaces. Thus, dirt easily washes off with each rainfall. The painted surface stays fresh and vibrant.

on left: some of the KNOxOUT air cleaning sites of Metro Manila.