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OSH Answers · Free Resources · Newsroom · Newsletters · Key Topics · Events A165 Series-14, CSA Standards on concrete masonry units (R2019) NEW! B52-99, Mechanical Refrigeration Code (R2004) NEW! F379 Series-09, Packaged solar domestic hot water systems (liquid-to-liquid heat transfer) (R2018) NEW! 17 Jul 2017 the intellectual property of AHRI and CSA Group and may give rise to a right in AHRI and or call toll-free 1-800-463-6727 or 416-747-4044.