As undergrad at UW-Madison, I have done some research with PCO (primarily UV-B&C activated titania/zirconia oxide catalysts). As Lennox seems to have one of the more complete purification systems on the market, I am interested to learn more about the Pureair system. In regards to the catayst, what is the cell size of the mesh screen? Are there multiple layers? Does the activated catalyst facilitate a reaction site on its own or is the efficacy of the process primarily in the reactions of hydroxls with influent air?

Also, a concern of mine is PCOs creation of CO2 as a biproduct of the oxidation reaction. With global concerns over carbon emmissions, at what point must we reconsider PCO as a viable solution to the IAQ problem?

I welcome any opinions...