8
GCUF/GRUF Vent-Free Fireboxes
Monessen • GCUF/GRUF Owner Manual • 71D0530 • Rev G • 01/20
Ensure that minimum clearances shown in Figures 4
through 8 are maintained. Left and right clearances are
determined when facing the front of the firebox.
Follow these instructions carefully to ensure safe instal-
lation. Failure to follow these requirements may create a
fire hazard.
1.
Sidewall clearances:
The clearance from the inside
of the appliance to any combustible wall should not be
less than 9".
Figure 4
2.
Ceiling clearance:
The ceiling must be at least 42"
from the top of the firebox opening.
Figure 4
3.
Back wall clearance:
The appliance may be placed
against a combustible back wall.
MINIMUM CLEARANCES
9"
Minim
um
42"
Minim
um
9"
Minim
um
FP2687
minimum clearances
FP2687
Figure 4 -
Clearance and Height Requirements
4.
Mantel clearances:
The canopy supplied with the unit
must be installed. If a combustible mantel is installed,
it must meet the clearance requirements as shown in
Figure 5
. However, if lower mantel height is desired,
refer to Page 14,
Figure 6
.
NOTE:
The Monessen Barrington Cabinet Mantel Model
series BWC300, BWC400 and BWC500 are specially
designed to comply with all mantel temperature require-
ments. Any custom-built mantel must comply with all
clearance requirements shown in this instruction manual.
12”
10”
8”
6”
2
¹⁄₂
”
12”
16”
19”
21”
23”
FP2690
Mantel clearances
Combustible
Material Can
Contact Top
of Fireplace
FP2690
Noncombustible Material
Only if Needed to Cover
Radiant Top Face
Figure 5 -
Mantel Clearances
12”
8”
8”
14”
FP2691
mantel clear wide canopy
FP2691
Figure 6 -
Mantel Heights for Wide Profile Canopy
45°
1”
2
¹⁄₂
”
3”
5”
6”
1¹⁄₂
”
3¹⁄₂
”
4¹⁄₂
”
FP2692
mantel leg clearance
6”
7
¹⁄₂
”
7
¹⁄₂
”
9”
Finish Wall
Combustible
Material Area
FP2692
Figure 5a -
Mantel Leg Clearance
