CAN/ULC-S604-M91

These requirements apply to Factory-Built Type 'A' Chimneys which do not require field fabrication. They are for use with gas and liquid fuel-fired residential appliances and building heating equipment, where the appliance or equipment flue-gas temperatures do not exceed 540 degrees C. They are intended for use in accordance with the National Building Code of Canada, Installation Code for Oil Burning Equipment, CAN/CSA-B139, and for Gas Burning Equipment, CAN/CGA-B149.1 and CAN/CGA-B149.2. They are intended for installation inside or outside of buildings to provide an essentially vertical conduit or passageway for conveying flue gases to the outer air from the above-described class of appliances.