4675.2000 Linings In Ducts


Published: 2015

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4675.2000 LININGS IN DUCTS.

Linings in air ducts and equipment shall meet the erosion test method described in Underwriters Laboratories Publication No. 181. Duct linings shall not be used in air supply systems for operating rooms unless terminal filters of at least 90 percent efficiency per ASHRAE Standard No. 52-68 are installed downstream of linings.