Patent ID: 7951327

Claim:
A method for filtering air in a fan coil unit having an air return, and an air supply, the method comprising: providing at least one modular photocatalytic purifier, the at least one photocatalytic purifier including a modular enclosure having a retractable alignment mechanism, and at least one UV lamp interposed between a plurality of titanium dioxide coated filter structures; using the retractable alignment mechanism to dispose the at least one modular photocatalytic purifier in an in-use position within the fan coil unit; directing air from the air return into the at least one photocatalytic purifier; bringing contaminants borne by the air into contact with the titanium dioxide coated filter structures; and directing UV radiation from the at least one UV lamp onto the titanium dioxide coated filter structures, wherein the titanium dioxide coated filter structures are activated to react with the contaminants to produce carbon dioxide and water.