Abstract: Purification assemblies and methods of use. A method of using a purification assembly, the purification assembly having a housing having a first open end and an opposite second open end, the housing defining an interior volume, and a longitudinal axis extending between the first open end and the second open end. The method includes forming a ring of UV radiation sources on an interior surface of the housing, wherein the longitudinal axis extends through the ring, and wherein at least a first set of the UV radiation sources lie on a plane. The method also includes causing the first set of UV radiation sources to emit UV radiation along the plane and flowing a stream of air through the housing toward the ring of UV radiation sources, wherein the intensity of the UV radiation exceeds a threshold along the entirety of the plane within the housing.