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r--, ' <br /> � <br /> � <br /> IVASHINGTON ASSOCIpT10N OF BUILDING OFFICIALS <br /> 13560 Sh�rman Road N.W„ S�a��ls, WothlnOton 98177 <br /> (206) 363•1779 <br /> September 14, 1978 <br /> Charles E. Walters, Jr. <br /> Gensco, Inc. <br /> 2601 Hood Street <br /> Tacoma, WA � 98409 <br /> Dear Mr. Walters: <br /> At the September 8 Washington Association of Building OffiCiali <br /> Research Comnittee meeting, Gensco-manufactured insulated flexible <br /> aluminum duct in 5" through 18" diameters and non-insulated in <br /> 3" through 18" diameters was given "interim approval" pending <br /> UL listing as an "alternate manufacturing facility" of this product. <br /> The ducts approved are. identical to those manufactured by Metalflex <br /> AirPDucta(FFGT)°�onapagen49aof theSSeptemberr1976rGasdandaOiliEquip- <br /> ment Directory as published by Underwriters Laboratories. <br /> It is our understanding that each piece of duct will be suitably <br /> identified with a label indicating the manufacturer and HABO <br /> approval. <br /> A research recommendation cannot be issued untit further information <br /> is furnished. In the meantime, this letter wi11 serve as evidence <br /> of WABO approval. <br /> Very truly y urs, <br /> . j� � <br /> ster J. G' lisX���G""" <br /> Executive S cretary <br /> LJ6:jg <br /> � <br /> . � <br />