Outdoor Combustion Air Supply
– Separated Combustion
Provide outside combustion air in applications with poor indoor air quality or
when furnace is located in de-pressurized area.
Combustion air is supplied from outdoors into the furnace burner compartment
through a properly sized pipe attached to the air intake collar.
This duct furnace installation requires a two (2) pipe separated combustion vent
system with separate air intake and vent pipes terminating in the same
pressure zone.
The venting and combustion air supply must be exclusive to a single
furnace.
Do not use dampers in vent or combustion air pipes.
