Lennox ENVY Installation Instructions Manual page 12

LENNOX HEARTH PRODUCTS • SIGNATURE
Installation of Vent Restrictor
A vent restrictor may be needed with this
appliance. The restrictor is installed in the
appliance top flue outlet (Figure 13), either
before adding vent from above, or after
installation of vent from below—within the
firebox. The restrictor is self securing with a
positive friction fit.
Determine the vent restrictor configuration
for the appliance (Figure 12):
Use the base vent restrictor for:
• Horizontal termination with total vertical
run of more than 6 ft.
• Vertical termination with total vertical
run of 6–10 ft.
Use intermediate setting for:
• Vertical termination with total vertical
run of >10–40 ft.
Use the maximum setting for:
• Vertical termination with total vertical
run of >40–60 ft.
f i r e - p a r t s . c o m
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SERIES DIRECT-VENT GAS FIREPLACES • ENVY/ENVY CD 35/40/45 • INSTALLATION INSTRUCTIONS
®
Figure 12: Vent Restrictor Configuration
Figure 13: Vent Restrictor Installation
Vent
Restrictor
Assembly
(held in place
by friction only)
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Base Vent Restrictor
Intermediate Vent Restrictor
Maximum Vent Restrictor
Vent
Collar