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TOP VIEW
E
7/8 in.
(Standard)
2 in.
(Deep)
Location
A
Opening Width - Rear
B
Opening Width - Front
C
Opening Height - Front
D
Opening Height - Rear
E*
Unit Opening Depth
F
Venting Depth - Front
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
Location
B
Alternate Opening Width - Front
C
Alternate Opening Height - Front
E
Alternate Unit Opening Depth
Note: 2 inch deep surrounds, in medium size black finish have been created as standard accessory.
Sku Names: MI30-4230D-BK, MI35-4432D-BK
*Unit depth is measured to the back of the surround to give the depth needed for installation.
In addition to these dimensions, also reference Section 3.D and 3.E.
Figure 3.9 Firebox Opening - Standard and Deep Surrounds
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.
Heat & Glo • SUPREME-I25/30/35-IFT, SUPREME-I25/30/35-BIR, SUPRM-I30LP-IFT Installation Manual • 2532-980 Rev. AD • 3/24
14
C
F
STANDARD SURROUND MINIMUM FIREBOX OPENING
25 inch
Inches
Millimeters
15-1/8
26-5/8
17-5/16
15-1/4
15
7-5/8
.
2 INCH DEEP SURROUND MINIMUM FIREBOX OPENING
25 inch
Inches
Millimeters
26
17-5/16
14
FRONT VIEW
B
D
A
30 inch
Inches
Millimeters
384
20-1/8
676
31-5/8
439
21
387
19-3/16
381
15
194
7-5/8
30 inch
Inches
Millimeters
660
31
440
21
356
14
SIDE VIEW
F
35 inch
Inches
Millimeters
511
25-1/8
638
803
36-5/8
930
533
24-1/4
616
487
21-11/16
551
381
15
381
194
7-5/8
194
35 inch
Inches
Millimeters
787
36
914
533
24-1/4
616
356
14
356
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