Travis Industries Revolution 36CF Installation Manual page 12

Minimum 78" Fireplace
Enclosure Height
18-1/4"
Glass
Centerline
56-1/2"
49-3/8"
22-1/2"
Vent Clearances:
8-5/8" Diameter vent requires 3-1/2" clearance to
the sides. You may need to notch the framing to
accommodate this clearance.
15-5/8"
NOTE: Do not build into
this area - it must be left
clear to provide
adequate clearance for
the vent.