The virtually maintenance-free tertiary air duct damper regulates the gas flow between the tertiary air duct and the furnace.
The tertiary air duct is delivered fully ready for installation and features a sliding door made of fire-resistant material. In addition, the door has two access panels to ensure easy access for maintenance. The sliding door consists of two parts: The lower part is a potential wear part and can be replaced as needed.
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Michael Suppaner
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