Page 14
10 - Install the two 90° street elbows (provided) through
the side of the cabinet. The male side of each
elbow should extend down through the blower deck
and connect to the rubber fittings below. Once the
elbows are properly positioned, tighten each clamp.
11 - Peel protective backing from side vent sealing
gaskets (2) and apply to side vent sealing plates (2)
12 - Install the side vent sealing plates and gaskets on
the exterior of the cabinet as shown in FIGURE
23. Secure with six mounting screws (four reused
and two provided from bag assembly). Holes are
pre-punched in the parts and cabinet, no drilling is
required.
13 - Install sheet metal screws (provided) to seal extra
two holes in cabinet not used with side vent clamps.
IMPORTANT
Side vent sealing plates and side vent sealing gaskets
must be used when converting to right side venting.
Failure to use gaskets and plates may lead to improper
operation of unit.
Top Vent Configuration
Exhaust/Air
Intake Connections
Pipe Clamp
Hose Clamp
FIGURE 20
Sheet Metal
Patch Plate
Patch Plate Top Cap
FIGURE 21
Crawl Space and Extended Horizontal Venting
Lennox provides kit 51W18 (USA) and kit 15Z70 (Cana-
da) to install 2” or 3” PVC exhaust piping through the floor
joists and into the the crawl space. See FIGURE 22.
This kit can also be used as a supplemental drain for in-
stallations with condensate run back in the vent pipe (ie.
long horizontal runs, unconditioned spaces, etc.).
Venting In A Crawl Space
Basement Floor
KIT 51W18
(USA)
KIT 15Z70
(CANADA)
FIGURE 22
