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MUA-SVX004B-EN
Duct Specifications
•
Ductwork which is outdoors must be insulated and sealed to prevent water from entering
either furnace or building through the duct.
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ntt:: Do not alter the flange connection for the duct attachment; air may bypass and
cause combustion problems. Be sure to properly seal to avoid any air leakage
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•
Ductwork connected to duct furnaces should have removable access panels on both the
upstream and downstream sides of the unit. These openings should be accessible when the
unit is installed, and should be sized so that smoke or reflected light can be observed inside
the casing to indicate the presence of leaks in the heating equipment. The covers of the
openings should be attached in a manner that prevents leaks.
