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ULC Subject 641
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ULC Subject 641 STANDARD FOR FACTORY-BUILT CHIMNEY CONNECTORS AND WALL PASS-THROUGH ASSEMBLIES (Bulletin, 1/26/2017)
standard by Underwriters Laboratories of Canada, 01/26/2017
M00001577
2021-06-03
New product
ULC Subject 641 STANDARD FOR FACTORY-BUILT CHIMNEY CONNECTORS AND WALL PASS-THROUGH ASSEMBLIES (Bulletin, 1/26/2017)
standard by Underwriters Laboratories of Canada, 01/26/2017