www.fmiproducts.com
54010F
7
Figure 10 - Pipe Connection
LINEAL GAIN
PART NO.
DESCRIPTION
GAIN
36L/R
Fireplace
42"
12-8DM
Pipe Section
10
5
/
8
"
18-8DM
Pipe Section
16
5
/
8
"
24-8DM
Pipe Section
23
5
/
8
"
36-8DM
Pipe Section
34
5
/
8
"
48-8DM
Pipe Section
46
5
/
8
"
RT-8DM
Round Termination
6
7
/
8
"*
RTL-8DM
Round Termination
7
3
/
4
"*
RTT-8DM
Round Termination
with Slip Section
6
7
/
8
" to
23
1
/
8
"*
RTTL-8DM
Round Termination
with Slip Section
7
3
/
4
" to
21
1
/
2
"*
ET-8DM
Square Chase
Termination
12"*
ETL-8DM
Square Chase with
Slip Section
7" to 15"*
ETO-8DM
Square Chase
with Mesh
12"*
ETLO-8DM
Square Chase
with Mesh and Slip
Section
12" to
21
1
/
2
"*
Hemmed
Ends
(Female)
8" Stainless
Inner Pipe
12
3
/
8
"
Galvanized
Outer Pipe
VENTING INSTALLATION
Continued
CHIMNEY SYSTEM
Chimney Height
Minimum chimney height measured fro
bottom of fireplace to flue gas outlet-end of
termination is:
Straight run
14 feet
Run with one elbow set
15 feet
Run with two elbow sets
24 feet
An elbow set consists of one starter elbow
and one return elbow. Uncommon circum-
stances such as neighboring hills, tall trees,
or strong wind areas can cause downdrafts in
chimney system. In such cases, going beyond
minimum recommended height would be
preferable to provide a better draw.
Maximum height approved for any chimney
run with this fireplace system is 60 feet as
measured from fireplace bottom to flue outlet
end of termination.
Double Wall Chimney System
The FMI PRODUCTS, LLC chimney system
consists of 12", 18", 24" 36" and 48" snap lock
double wall pipe segments, planned for maxi-
mum adaptability to individual site require-
ments. 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.
Each double wall chimney section consists
of a galvanized outer pipe, a stainless steal
inner flue pipe and a wire spacer. Pipe sec-
tions must be assembled independently as
chimney is installed. When connecting chim-
ney directly to fireplace, inner flue pipe section
must be installed first with lanced (female)
side up (see Figure 10). Outer pipe section
can then be installed over flue pipe section
with hemmed (male) end up. Press down on
each pipe section until lances securely engage
hem on fireplace starter. The wire will assure
proper spacing between inner and outer pipe
sections.
Continue to assemble chimney sections as
outlined above, making sure both inner and
outer pipe sections are locked together.
When installing double wall snap-lock chim-
ney together, it is important to assure the
joint between chimney sections is locked.
Check by pulling chimney upward after lock-
ing. Chimney will not come apart if properly
locked. It is not necessary to add screws to
keep chimney together. However, if desired,
use screws per directions provided on page
8, Figure 11.
Lanced
Ends
(Male)
*Lineal Gain for Terminations is measured to
Flue Gas Outlet Height.
Figure 9 - Air Kit Damper Rod
Air Kit
Damper
Rod-
Closed
Position
Open
Position
Lower
Left
Side of
Fireplace
Opening
