Patent ID: 7717775

Claim:
A unitary filter assembly for suspended particles for a clean room, the unitary filter assembly comprising: a frame defining the peripheral extent of the unitary filter assembly and consisting of two first parallel continuous frame sides, two second parallel continuous frame sides, and two parallel continuous sidewalls, wherein the two second parallel frame sides are arranged perpendicularly to the two first parallel frame sides and connected to opposite ends of the two first parallel frame sides, respectively, so as to define a frame interior and wherein the two parallel sidewalls extend parallel to the two second parallel frame sides and are connected perpendicularly to the two first parallel frame sides at a spacing from the ends of the two first parallel frame sides to an inwardly facing side of the two first parallel frame sides so that said frame interior of said frame is divided into a first and a second receiving chambers and an intermediate space between the first and second receiving chambers; filter media arranged inside said frame in the first and second receiving chambers, respectively, wherein a direction of flow of air to be filtered through the filter media is parallel to the two sidewalls and the two first and the two second parallel frame sides; wherein in the intermediate space at least one illumination means which illuminates a space outside of the unitary filter assembly is arranged; and wherein the at least one illumination means is separated from the filter media on a first side only by a first of the two parallel sidewalls and is separated from the filter media on a second side only by a second of the two parallel sidewalls.