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139684_Rev_7 / C 450 Kennebec 7 / 17
Mantel and Wall Clearances
Clearances are measured from the hearth surface,
door opening, or centerline as noted in fig 8-10.
A: Hearth Protection:
Width from centerline......................... 20” (508 mm)
B: Hearth Protection:
forward from the door opening ......... 18” (457 mm)
C: Side Trim
- 6” max. depth, from centerline
:
Firebox flush with fireplace face ...............
22” (559 mm)
Firebox extended from fireplace face ......
27” (686 mm)
D: Side Wall
- from centerline:
Regardless of Firebox position
................. 27” (686 mm)
E: Upper Trim
- Same as Mantel at Max. Depth 3 1/2”
(90 mm) See Table 1.
F: Mantel
- See Figures 9- 10 and Table 1.
Figure 8. Clearance Diagram - No Heat Shielding
Figure 9.
FLUSH FIREBOX
Clearance to Combustible Materials
These clearaces apply only to those C 45o inserts
manufactured after December 2014 having
serial numbers higher than 14250.
See Appendix B, page 20 for older units.
• There may be no combustible materials located
anywhere within 36” (914 mm) of the front of the door..
This precaution includes items such as drapes or doors
that could swing into the area within 36” of the insert.
• Clearance (open space) must be maintained between the
fireplace insert and combustible materials located above
and to the side. See figures 8-10 and Table 1 for minimum
dimensions.
Mantel Clearance with
Optional Heat Shield
155346
Clearance may be reduced as shown in Table 1.
Maximum approved Mantel Depth is 11 1/2”.
Clearance is measured from the hearth to the bottom
of the mantel as illustrated.
Figure 10.
EXTENDED FIREBOX
Mantel Clearances - Serial Nos. after 14250
Flush Firebox
Fig. 9
Extended Firebox
Fig. 10
No Heat
Shield
Heat
Shield
No Heat
Shield
Heat
Shield
A
45”
1143 mm
40”
1016 mm
44
1118 mm
41”
1041 mm
B
43 1/2”
1105 mm
38 1/2”
978 mm
42 1/2”
1080 mm
39 1/2”
1003 mm
C
42”
1067 mm
37”
940 mm
41”
1041 mm
38”
965 mm
D
40 1/2”
1029 mm
35 1/2”
902 mm
39 1/2”
1003 mm
36 1/2”
927 mm
E
39”
991 mm
34”
864 mm
38”
965 mm
35”
889 mm
Table 1.
