This National Standard of Canada covers lining systems for existing masonry chimenys, which may or may not incorporate a liner of fire-clay tile, and existing factory-built chimneys and vents.Lining systems are classed as follows: Class 1 - For the venting of gas-fired appliances where the temperature of the flue-gas products in 135 C or above, but does not exceed 245 C; Class 2 - For the venting of oil and gas-fired appliances where the temperature of the flue-gas products does not normally exceed 300 C; and Class 3 - For the venting of oil-, gas- and solid-fuel fired appliances where the temperature of the flue-gas products does not normally exceed 650 C.
Product Details
Edition: 3 Published: 08/01/2016
M00001605
2021-06-03
New product
ULC 635
Standard for Lining Systems for Existing Masonry or Factory-Built Chimneys and Vents (ULC S635:2016)
standard by Underwriters Laboratories of Canada, 08/01/2016