UL1820：压缩空气管耐火焰和烟雾性能的防火测试
日期:2011-01-28 00:00
nce with the provisions of Installation of Air Conditioning and Ventilating Systems, NFPA 90A. Exception No. 3 of Section 2-2.1.2 of NFPA 90A states that pneumatic tubing having the required fire-resistant and low-smoke-producing characteristics are capable of being installed in the space between the ceiling and the floor or roof above, used as an air handling plenum.
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08/27 11:30