Vent Diagrams - Heatilator GDFL4136I Owner's Manual

E. Vent Diagrams
General Rules:
• A maximum of three 90° elbows (or six 45° elbows) may
be used in any vent confi guration. Some elbows may be
installed horizontally. See Figure 7.6.
• Elbows may be placed back to back anywhere in the
system as long as the fi rst 90° elbow is a starter elbow
except as shown in Figure 7.3.
• When penetrating a combustible wall, a wall shield
fi restop must be installed.
• When penetrating a combustible ceiling, a ceiling fi restop
must be installed.
• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.
• Horizontal termination cap should have a 1/4 inch
downward slant to allow any moisture in cap to be
released. See Figure 7.3.
Top Vent—Horizontal Termination—Two 45° Elbows
Installation requirements to replace the fi rst 90° elbow with two 45° elbows:
1/4 in. max.
Figure 7.3
26 Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. W • 12/15
(6 mm)
Note: The Multi-Sided series fi replaces can adapt
to SLP series vent pipe, if desired.
When venting off the top of the unit, attach a DVP-2SL adapter to
the appliance starting collar, immediately followed by a minimum
48 inch vertical section of SLP series vent pipe.
After the 48 inch vertical section, the venting table rules
must be followed. The fi rst 48 inch vertical section is NOT
counted as part of the vertical components in the table. It is
still counted as part of the overall maximum run. All venting
table rules for the vent run must still be followed.
Example: DVP pipe 3 ft. min. vertical = 11 ft. max. horizontal
SLP pipe 7 ft. min. vertical = 11 ft. max. horizontal
4 ft min.
(1.22 m)
16 ft max.
(4.87 m)
Note: Reference Figure 7.14 for
special instructions for use of 45º
elbow on rear vent appliances.