Abstract: Air purification or filtration unit having a triangular housing, with the open front face being the hypotenuse of the triangle. The unit is particularly adaptable for use with conventional sized high efficiency particulate air, or HEPA filters and low penetration air, or ULPA filters, to create a highly filtered clean air environment. The unit includes a circulating fan within the housing to draw air through the filters and housing and to exhaust the air through the top housing wall for recirculation, and can also be ducted to exhaust filtered air from the environment, either in whole or in part. A germicidal ultra violet light may be placed within the housing for additional air purification.