Vent Diagrams - HEAT GLO SL-3X Installation Manual

G. Vent Diagrams
General Rules:
• SUBTRACT 3 ft. from the total H measurement for each
90º elbow installed horizontally.
• SUBTRACT 1-1/2 ft. from the total H measurement for
each 45º elbow installed horizontally.

• Rear Vented: A maximum of three 90º elbows (or six 45º
elbows) may be used in any vent confi guration. Some
elbows may be installed horizontally. See Figure 4.23
and 4.24.

• Top Vented: A maximum of four 90º elbows (or eight 45º
elbows) may be used in any vent confi guration. Some
elbows may be installed horizontally. See Figure 4.16
and 4.17.
• Elbows may be placed back to back anywhere in the
system.
•
Any 90º elbow may be replaced with two back to back
45º elbows.
• 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 4.9.
1/4 in. max.
(6 mm)
Figure 4.9 Vent Cap - Generic Fireplace Shown
Heat & Glo • SL-3X, SL-5X, SL-7X, SL-9X Installation Manual • 2372-980 Rev. C • 8/16 21