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Are the AMPCO® VSI products listed for positive pressure?

April 26, 2017positive pressure products VSI

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Are the AMPCO® VSI products listed for positive pressure?

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All of the AMPCO® VSI product lines have passed the UL 103 Positive Pressure Applications Test (Sec. 22A). This test qualifies these products to be used on positive pressure systems. If manufacturers do not label their product indicating a rated maximum internal pressure when used in positive pressure applications, they are not suitable or listed to be used as a positive pressure vent or chimney. At this time there are very few manufacturers that have passed this mandatory test for positive pressure applications.