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The IHP chimney system is a snap-lock, double-wall pipe. It consists
of a stainless steel inner flue pipe(s), a galvanized outer pipe and a
wire spacer. Each section of pipe comes in lengths of 12", 18", 36"
and 48". The actual lineal gain for each is measured after each section
is fully connected. Lineal gain is the actual measurable length of a
part after two or more parts are connected.
LINEAL GAIN
PART NO.
Windsor STP2
See-Through Fireplace
48-12DM
48-12TM
36-12DM
48-12TM
24-12DM
48-12TM
18-12DM
48-12TM
12-12DM
48-12TM
STL-12D
RLT-12D
PIPE INSTALLATION
The pipe sections must be assembled independently as the chimney
is installed. When connecting chimney directly to the fireplace, the
inner flue pipe section must be installed first with the lanced side up.
The outer pipe section can then be installed over the flue pipe section
with the hemmed end up. Press down on each pipe section until the
lances securely engage the hem on the fireplace starter. The wire will
assure the proper spacing between the inner and outer pipe sections.
Continue to assemble chimney sections as outlined above, making
sure that both the inner and outer pipe sections are locked together.
When installing double wall snap-lock chimney together, it is impor-
tant to assure the joint between the chimney sections is locked. Check
by pulling chimney upward after locking. The chimney will not come
apart if properly locked. It is not necessary to add screws to keep the
chimney together (exception, see Figure 17, page 9).
WARNING: The opening in collar around chimney
at top of fireplace must not be obstructed. Never use
blown insulation to fill chimney enclosure.
15"
Galvanized
Outer Pipe
12 3/8''
Stainless Inner
Pipe Lanced
Side Up
Figure 14 - Pipe Connection
8
VENTING INSTALLATION Continued
DESCRIPTION
GAIN
52
/
"
3
4
Flue Pipe
46
/
"
5
8
Flue Pipe
34
/
"
5
8
Flue Pipe
22
/
"
5
8
Flue Pipe
16
/
"
5
8
Flue Pipe
10
/
"
5
8
Chase Style
1" to 12"
Termination
Round Top
7"
Termination
Hemmed
End
Superiorfireplaces.US.com
USING ELBOW OFFSETS AND SUPPORTS
Chimney weight above offset rests on return elbow. Straps must be
securely nailed to rafters or joists (see Figure 15).
To achieve desired offset, you may install combinations of 12", 18",
36" and 48" length of double wall pipe (see offset chart and Figure 16).
Maximum length of pipe between supports is 6 feet of angled run. A
maximum of two 6 feet angled run sections per chimney system (see
Figure 18).
SUPPORT SECTIONS
The chimney support section is a 4-strap 12" length of pipe. The height
of a vertical chimney pipe supported ONLY by the fireplace, must not
exceed 20 feet. Chimney heights above 20 feet must be supported.
12S-8DM
Support
20 FT.
Required
(6.096m)
Figure 15 - Elbow Offset
OFFSET
RISE
CHIMNEY LENGTH
A
B
48"
36"
18"
4
/
"
16
/
"
ELBOW SET ONLY
3
3
8
8
9
/
"
25
/
"
1
1
1
2
4
12
/
"
30
/
"
1
1
3
2
8
14
/
"
34"
3
8
17
/
"
39
/
"
1
5
1
8
4
21
/
"
46"
1
1
2
22
/
"
48
/
"
1
3
1
4
8
26
/
"
54
/
"
1
3
7
8
8
26
/
"
60"
1
1
3
8
31
/
"
63
/
"
1
1
3
3
4
4
34
/
"
69"
1
1
3
4
38
5
/
"
75
5
/
"
2
8
8
39
/
"
77
/
"
1
1
7
7
8
8
43
/
"
84
/
"
1
1
3
1
4
2
46
/
"
87
/
"
2
1
3
3
4
4
48
/
"
93
/
"
2
7
3
8
8
OFFSET CHART
Figure 16 - Raise and Offset
20 FT.
(6.096m)
Return
Elbow
12"
2
1
Screws
2
1
A
126613-01B
B
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