15
Tunnel Series Framing
Combustible Framing
Non-Combustible Framing
WARNING – MAINTAIN AIR FLOW CLEARANCE:
Firebox front top vent must have minimum 4” of clearance to
any material achieve sufficient airflow
. Failure to do so could result in improper fireplace operation, property damage,
or physical injury. See page 21 for details.
Review “General Clearances” section prior to framing to ensure all clearances are followed. See page 18 for details.
Model
Framing
Dimension A
Dimension B
Dimension C
Dimension D
Dimension E
40H70 TN
Combustible
55
3
/
8
”
24
5
/
8
"
18
7
/
8
”
Refer to pipe
manufacturer’s
firestop
dimensions
14
3
/
8
”
Non-Combustible 41"
N/A
75x65 TN
Combustible
53
3
/
8
”
38
3
/
8
”
18
7
/
8
”
15
1
/
8
”
Non-Combustible
38
3
/
8
”
N/A
31H TN
(aka 75x65H TN)
Combustible
92
9
/
16
”
36
13
/
16
”
15
1
/
2
"
13
3
/
4
"
Non-Combustible
74
13
/
16
”
N/A
60x80 TN
Combustible
57”
29
3
/
8
”
18
7
/
8
”
14
5
/
8
”
Non-Combustible 42
3
/
8
”
N/A
110 TN
Combustible
41
5
/
8
”
51
7
/
8
”
19”
14
1
/
8
”
Non-Combustible
27
1
/
2
”
N/A
110H TN
Combustible
49
1
/
2
”
51
7
/
8
”
19”
14
1
/
8
”
Non-Combustible 35
3
/
8
”
N/A
130 TN
Combustible
41
5
/
8
”
58
5
/
8
”
19”
14
1
/
8
”
Non-Combustible
27
1
/
2
”
N/A
130H TN
Combustible
49
1
/
2
”
58
5
/
8
”
19”
14
1
/
8
”
Non-Combustible 35
3
/
8
”
N/A
150 TN
Combustible
41
5
/
8
”
68
1
/
2
”
19”
14
1
/
8
”
Non-Combustible
27
1
/
2
”
N/A
150H TN
Combustible
49
1
/
2
”
68
1
/
2
”
19”
14
1
/
8
”
Non-Combustible 35
3
/
8
”
N/A
170 TN
Combustible
41
5
/
8
”
76
3
/
8
”
19”
14
1
/
8
”
Non-Combustible
27
1
/
2
”
N/A
170H TN
Combustible
49
1
/
2
”
76
3
/
8
”
19”
14
1
/
8
”
Non-Combustible 35
3
/
8
”
N/A
200 TN
Combustible
41
5
/
8
”
85
3
/
4
”
19”
14
1
/
8
”
Non-Combustible
27
1
/
2
”
N/A
200H TN
Combustible
49
1
/
2
”
85
3
/
4
”
19”
14
1
/
8
”
Non-Combustible 35
3
/
8
”
N/A
250 TN
Combustible
43
5
/
8
”
104
1
/
4
"
19”
14
Non-Combustible
29
5
/
8
”
N/A
250H TN
Combustible
49
1
/
2
”
104
1
/
4
"
19”
14
Non-Combustible 35
1
/
2
”
N/A
→
→
