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ULC 636
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ULC 636 Standard for Type BH Gas Venting Systems (ULC S636-08)
standard by Underwriters Laboratories of Canada, 07/31/2008
Full Description
The Standard covers the design, construction, and performance of gas venting systems intended for negative or positive pressure venting of gas-fired appliances producing flue gases having temperatures under the following: (1) Class I venting systems are suitable for gas-fired appliances producing flue gas temperatures of more than 135C but not more then 245C; (2) Class II venting systems are suitable for gas-fired appliances producing flue gas temperatures of 135C or less; (3) Class II venting systems are further classified into four temperature ratings as follows: (A) Up to and including 65C; (B) Up to and including 90C; (C) Up to and including 110C; and (D) Up to and including 135C.
M00001935
2021-06-03
New product
ULC 636 Standard for Type BH Gas Venting Systems (ULC S636-08)
standard by Underwriters Laboratories of Canada, 07/31/2008