15
Majestic • TRILLIANT25IN, TRILLIANT30IN, TRILLIANT35IN Installation Manual • 2571-980 Rev. B • 5/23
Figure 3.10 Firebox Opening - Standard Surround - 3/4 in.
In addition to these dimensions, also reference Section 3.D and 3.E.
TOP VIEW
FRONT VIEW
SIDE VIEW
*Unit depth is measured to the back of the surround to give the depth needed for installation.
F
D
C
A
B
F
E
7/8 in.
(Standard)
2 in.
(Deep)
MINIMUM FIREBOX OPENING
Location
25 inch
30 inch
35 inch
Inches
Millimeters
Inches
Millimeters
Inches
Millimeters
A
Opening Width - Rear
15-1/8
384
20-1/8
511
25-1/8
638
B
Opening Width - Front
26-5/8
676
31-5/8
803
36-5/8
930
C
Opening Height - Front
17-5/16
439
21
533
24-1/4
616
D
Opening Height - Rear
15-1/4
387
19-3/16
487
21-11/16
551
E*
Unit Opening Depth
15
381
15
381
15
381
F
Venting Depth - Front
7-5/8
194
7-5/8
194
7-5/8
194
Note: Dimensions assume 1/4 inch clearance on all sides.
Note: If exhaust collar on insert and fireplace damper do not line up, add 4 inches (102 mm) to minimum fireplace
height for bends in vent pipe.
Custom Surrounds
Custom surrounds are available. See your dealer for information. Standard surrounds are 3/4 inches deep. Custom
surrounds are available up to 3 inches deep. A 3 inch deep surround would reduce the unit opening depth
(E*)
by 2-1/4
inches (3 in. - 3/4 in. = 2-1/4 in).
On Site Custom Surrounds
On site custom surrounds are available. See your dealer for information. On site custom surrounds are flush and have
no depth. A flush surround would increase the unit opening depth
(E*)
by 3/4 inch.
2 INCH DEEP SURROUND MINIMUM FIREBOX OPENING
Location
25 inch
30 inch
35 inch
Inches Millimeters
Inches
Millimeters
Inches
Millimeters
B
Alternate Opening Width - Front
26
660
31
787
36
914
C
Alternate Opening Height - Front
17-5/16
440
21
533
24-1/4
616
E
Alternate Unit Opening Depth
14
356
14
356
14
356
Note: 2 inch deep surrounds, in medium size black finish have been created as standard accessory.
Sku Names: MI30-4230D-BK, MI35-4432D-BK