Avalon Firestyles 864 See-Thru GS2 Installation - Manual (Page 15)

Installation
(for qualified installers only)
15
© Travis Industries 4141208 100-01404
Minimum Framing Dimensions – Top or Side Vent Configuration
* The 26" (661mm) dimension is based upon 1/2" (13mm)
drywall around the perimeter of the fireplace on both sides. If
using thicker drywall (or other facing), you will need to adjust this
dimension.
44"
1118mm
Minimum 42”(1067mm)
Fireplace Enclosure Height
NOTE:
The shaded framing must be
installed after placing the fireplace
in position.
The framing above the fireplace
interferes with the top of the fireplace.
If using the side vent configuration, do
not install the framing to the left side
(shown in light gray).
38-1/2"
978mm
26" *
661mm
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Front
Right
Left