When odors are a problem the best choice is our Patriot PCO. This advanced whole-house air purifier uses UV-C light in combination with specially prepared activated carbon cells to create a photocatalytic (PCO) reaction. Nearly all odors are caused by volatile organic compounds or VOCs. Many VOCs , such as formaldehyde and toluene are also toxic. Patriot PCO neutralizes VOCs in a process similar to the way the catalytic converter in your car works. When VOCs are neutralized the odors are destroyed and the hydrocarbon molecules that cause them are reduced to harmless water vapor and carbon dioxide. Because the UV-C light in Patriot PCO is positioned where it is, it can also disinfect the coils, air system interior, and air stream the same way Patriot UV does.