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BS 5991:1989 Specification for indirect gas fired forced convection air heaters with rated heat inputs up to 2 MW for industrial and commercial space heating: safety and performance requirements (excluding electrical requirements (2nd family gases)
standard by BSI Group, 02/28/1990
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Safety and performance requirements and methods of test for permanently installed open flued space heating appliances intended for industrial and commercial applications.Cross References: BS 10*BS 21*BS 476:Part 4*BS 476:Part 5*BS 476:Part 7*BS 729*BS 800*BS 1041 *BS 1042:Section 2.1*BS 1179:Part 6*BS 1224 *BS 1706*BS 1756*BS 2757*BS 2989*BS 3042*BS 3554:Part 2*BS 3955*BS 4201*BS 4504:Part 1*BS 4504:Part 2*BS 4921*BS 4947 *BS 5000:Part 11*BS 5000:Part 99*BS 5963*BS 5986*BS 5990*BS 6047:Part 1*BS 6067*BS 6448:Part 1*Clean Air Act, 1956**