F-F-320B, FEDERAL SPECIFICATION: FILTERS, ELECTRONIC AIR CLEANING, IONIZING PLATE TYPE (23 JUN 1985) [NO S/S DOCUMENT]

F-F-320B, FEDERAL SPECIFICATION: FILTERS, ELECTRONIC AIR CLEANING, IONIZING PLATE TYPE (23 JUN 1985) [NO S/S DOCUMENT]., This specification covers electronic air cleaning filters having ionizing sections and charged, plate-type collector sections, designed for use in nonresidential air cleaning systems.