S.D. Admin. R. 44:76:12:11
A ventilation system shall be equipped with a minimum of two filter beds. Filter bed number one shall be located upstream of the conditioning equipment and shall have a minimum efficiency of 30 percent. Filter bed number two shall be located downstream of the conditioning equipment and shall have a minimum efficiency of 90 percent. Central systems serving other than sensitive areas shall be provided with filters rated at 80 percent efficiency. These filter efficiencies shall be warranted by the manufacturer and shall be based on the ASHRAE 52.2, 2007 edition, American Society of Heating, Refrigeration, and Air Conditioning Engineers dust spot test method with atmospheric dust. The exhausts from all laboratory hoods in which infectious or radioactive materials are processed shall be equipped with filters with a 99 percent efficiency. Filter frames shall be durable and shall provide an airtight fit with the enclosing ductwork. All joints between filter segments and the enclosing ductwork shall have positive seal against air leakage.
S.D. Admin. R. 44:76:12:11
General Authority: SDCL 34-12-13(2), (3), and (14).
Law Implemented: SDCL 34-12-13(2), (3), and (14).
"ASHRAE 52.2," 2007 edition, American Society of Heating, Refrigeration, and Air Conditioning Engineers, 1791 Tullie Circle, N.E., Atlanta GA 30329. Phone: 1-800-527 -4723. Cost: $39.00.