Lennox MERIT ML180DFE Installation Instructions Manual page 12

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Duct Installation
Down-Flow Unit
SUPPLY
Figure 14
Common Venting Using Tile-Lined Interior Masonry Chimney and Combined Vent Connector
NOTE- Refer to provided venting tables
for installations.
AIR
MINIMUM LENGTH = AS SHORT AS PRACTICAL.
FOR MAXIMUM LENGTH SEE NOTE TO LEFT
OTHER
APPLIANCE
VENT CONNECTION
FLUE TRANSITION
COLLAR
VENT
CONNECTOR
FURNACE
AIR FLOW
Figure 16
Page 12
"DISCONNECTED VENT"
WARNING
STICKER
Figure 15
INTERIOR TILE-LINED
MASONRY CHIMNEY
NOTE - the chimney must be properly
sized per provided venting tables or
lined with listed metal lining system.
PERMANENTLY
SEALED FIREPLACE
OPENING

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