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Heatilator • GNTC50 • 4002-095 Rev H • 06/07
27
Convert to Rear Vent
• Remove the back cover plate, outer cover plate and inner
cover plate by removing the screws.
• Place the 5 in. inner collar in the appliance with the screws
removed from the cover plates.
• Attach the 8 in. outer collar to the appliance back using
the screws removed. Make sure the gaskets for the inner
and outer collars seal tightly.
• Place the 12 in. back
fl
ue cover with an 8 in. hole over the
outer collar and secure with screws removed. See Figures
7.3 and 7.4.
• Place the top cover plate with insulation and without the
8 in. hole on the top of the appliance and secure with
screws from the parts bag.
When rear venting, seal the
unused top opening with the
insulated top cover plate.
Install with the insulation down.
When top venting, use the insulated
top flue cover plate with an 8 in.
opening. Install with the insulation
down.
The opening on the top of the
appliance must be sealed with
an insulated cover.
Figure 7.3 Insulated Top Covers
12 in. Back
Flue Cover
8 in. Outer
Collar
5 in. Inner
Collar
Figure 7.4 Rear Vent Placement of Inner and Outer Collars