Saf-T Vent Special Gas Vent systems are UL, ULC ,and cUL listed for venting Category II, III, and IV gas burning appliances. Residential applications include mid- and high-efficiency gas boilers and furnaces, booster heaters, pool heaters, water heaters, unit heaters, and tankless water heaters. Saf-T Vent may also be used as a vent for Category I natural gas or propane-fired heaters. Commercial applications include boilers, water heaters, and furnaces installed in hotels, schools, offices, and industrial buildings.
AL29-4C alloy is a superferritic stainless steel designed by Allegheny Ludlum for extreme resistance to corrosive condensates created by partially or fully condensing natural gas and propane-fired heating appliances, where cool flue gases are vented under pressure. The Canadian Gas Research Institute found that test results showed AL29-4C to be one of the "most corrosion resistant alloys of 20 candidate stainless steels evaluated for resistance to chloride induced corrosion in condensing and partially condensing gas-fired appliances."
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Publication date: 08/22/2005