Model HS/HSS

This chimney is listed (UL 103TYPE HT) for venting flue gases not exceeding 1000°F under continuous operating conditions. In addition, UL has conducted additional tests at 1400°F for one hour and 2100°F for 10 minutes to verify compliance with UL test standards. The Model HS incorporates a design-woven ceramic fiber refractory blanket. Surrounded by two inner walls, this asbestos-free blanket has excellent high-temperature stability, so it stays in place.

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