October 3, 2017
7036-188J
9
MT VERNON AE INSERT
C. Minimum Opening for Masonry & Zero
Clearance Fireplaces
Figure 9.3
Figure 9.1
FIREPLA
CE FR
ONT SURF
A
CE
USA 15-1/8
CANADA 15-1/8 (537mm)
41-3/4
1060mm
12in max *
MANTEL
If employing a hearth extension, any parts or materials used in
construction must be non-combustible.
C
D
A
B
SIDE
TRIM
SIDE
W
ALL
TOP TRIM
18-5/16
465mm
23-5/8
600mm
HEARTH
EXTENSION
16
(406mm)
29-3/4
1010mm
Figure 9.2
HEARTH EXTENSION
No thermal protection required
Ember protection only!
*If mantel depth is 10 inches or less, than the height from the
hearth to the bottom of the mantel is 39-3/4 inches.
Minimum Opening Dimensions
Inches
Millimeters
A Height
24-1/8
613
B
Front Width
(Steel Panel Set)
32-1/4
819
Front Width
(Cast Panel Set)
32-1/4
819
C
Back Width
24-1/8
613
D
Depth
(Steel Panel Set)
15-3/8
391
Depth
(Cast Panel Set)
15-1/4
387
Note:
Minimum opening dimensions include a
1/4” (6mm) clearance around unit.
Note:
If trim measurement is over 3/4 in (19mm) in
depth use mantle or side clearances to combustibles.