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CENSC <br /> DISTRIBUTOR AND MANUFACTURER OF HVAC PRODUCTS <br /> May 7,2012 <br /> To Whom It May Concern, <br /> This letter is to confirm that the galvanized material used in the manufacturing of our product meets the <br /> requirement of a smooth wall,non-absorbent,pipe commonly used to vent bath fans,domestic clothes <br /> dryers,and domestic range hoods, as stated in the current International Mechanical Code. The gauge of <br /> the material used also meets current SMACNA standards. <br /> If you need further information, please feel free to contact me. <br /> Cordially, <br /> 5terlin Nicks <br /> Vice President of Columbia Mfg. <br /> WASHINGTON :TAGOMA,SEATTi.F,KIRKLAND,SPOKANE,YAKIMA,BELLINGHAM, MAIN OFFICE 4402 20th Street E. <br /> OLYMPIA,KENNEWICK,EVERETI;VANCOUVER,BREMERTON,AUBURN Tacoma,Washington 9W4-iW3 <br /> 9 <br /> OREGON :PORTLAND,TIGARD.SALEM,BEND,EUGENE,MEDFORD,HILLSBORO (2 2 - <br /> ALASKA :ANCHORAGE Fax(253) 26-2073 <br /> 3 <br /> 07 <br /> MONTANA .k4ISSOULA,BILLINGS,KALISPELL- <br /> IDAHO :BOISE <br />