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CSA ANSI 3.21:19

Industrial gas-fired natural draft heaters for installation in non-hazardous and hazardous locations in oil and gas process applications
standard by CSA Group, 03/01/2019

CSA A440-17

North American Fenestration Standard / Specification for windows, doors, and skylights, Includes Errata (2018)
standard by CSA Group, 12/01/2017