Cottage Base Model: Omccot-Base - Thermo Pride GMC-85 Installation And Service Manual

All installations and services must be performed by qualified service personnel.
If the combustion air passageway cannot terminate outside of the skirting or enclosure, a
permanent opening with a minimum of 50 square inches of unobstructed infiltration (free
area) for ventilation air must be provided for adequate combustion. This permanent opening
must be located no less than 12 inches from the bottom of the enclosure or skirting.
Figure 3.
Slit the corners of feeder duct down to the top of the top panel. If metal projects more than 1 inch
above the top panel, trim the flanges down to 1 inch. While the top of distribution duct is being
pulled up with one hand, bend down each side of the feeder duct tightly to the top panel with the
other hand. This assures a tight connection between the top panel and the feeder duct and that the
distribution duct will be full size. Use high temperature tape and/or high temperature silicone
caulking on all joints and seams to minimize air leakage. Secure the top panel to the floor with
two screws in the front flange.

2. Cottage Base Model: OMCCOT-BASE

The OMCCOT-BASE cottage base (Figure 1B) is required for a freestanding cottage base
installation. The cottage base is designed to permit the installation of an 8-inch x 12-inch register
in each of the two side panels and the rear panel. This allows combustion air to be drawn from
outside, or inside, the structure whichever is appropriate, or permissible. See section G.
COMBUSTION AIR for further details regarding combustion air requirements.
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