Lennox ELITE EL296DFE Installation Instructions Manual page 9

Gas furnace downflow air discharge
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Horizontal
NOTE - Do not install the furnace on its front, back or in the horizontal position
FIGURE 12
WARNING
Improper installation of the furnace can result in personal
injury or death. Combustion and flue products must
never be allowed to enter the return air system or air
in the living space. Use sheet metal screws and joint
tape to seal return air system to furnace. In platform
installations with furnace return, the furnace should be
sealed airtight to the return air plenum. A door must
never be used as a portion of the return air duct system.
The base must provide a stable support and an airtight
seal to the furnace. Allow absolutely no sagging, cracks,
gaps, etc. For no reason should return and supply air
duct systems ever be connected to or from other heating
devices such as a fireplace or stove, etc. Fire, explosion,
carbon monoxide poisoning, personal injury and/or
property damage could result.
Page 9

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