Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data
which may improve this document should be sent to Officer in Charge, Seabee Logistics Center
(Code 15E2), 4111 San Pedro Street, Port Hueneme, CA 93043-4410, by using the
Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this
document or by letter.
AMSC N/A FSC 4460
[INCH-POUND]
F-F-320C
June 26, 1998
SUPERSEDING
F-F-320B
June 23, 1985
FEDERAL SPECIFICATION
FILTERS, ELECTRONIC AIR CLEANING, IONIZING PLATE TYPE
The General Services Administration has authorized the use of this
specification by all Federal agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope. This specification covers electronic air cleaning filters having ionizing sections and
charged, plate-type collector sections, designed for use in nonresidential air cleaning systems.
1.2 Classification. The filter units shall be of the following types, styles, classes, groups, and size,
as specified (see 6.2):
Type I - Oiled-plate type with traveling or oscillating washwater and adhesive-oil
system, ionizing type.
Type II - Dry-plate type with washwater/detergent system and permanent after-filters,
ionizing type.
Type III - Dry-plate type with disposable after-filter media, ionizing type.
Style A - Roll-type filter, vertical, standard type.
Style B - Roll-type filter, vertical, compact design.
Style C - Roll-type filter, horizontal.
Style D - Extended media-type, stationary filter.
Class 1 - Standard efficiency.
Class 2 - High efficiency.
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