www.desatech.com
123226-01B
7
Figure 8 - Lineal Gain
LINEAL GAIN
PART NO.
DESCRIPTION
GAIN
36"
Fireplace
37
1
/
2
"
12-8DM
12-8HT
Pipe Section
10
5
/
8
"
18-8DM
18-8HT
Pipe Section
16
5
/
8
"
24-8DM
24-8HT
Pipe Section
23
5
/
8
"
36-8DM
36-8HT
Pipe Section
34
5
/
8
"
48-8DM
48-8HT
Pipe Section
46
5
/
8
"
RT-8DM
RT-8HT
Round Termination
6
7
/
8
"*
RTL-8DM
RTL-8HT
Round Termination
7
3
/
4
"*
RTT-8DM
RTT-8HT
Round Termination
with Slip Section
6
7
/
8
" to
23
1
/
8
"*
RTTL-8DM
RTTL-8HT
Round Termination
with Slip Section
8
1
/
2
" to
21
1
/
2
"*
ET-8DM
ET-8HT
Square Chase-Top
12"*
ETO-8DM
Square Chase-Top
with Mesh
12"*
ETL-8DM
ETL-8HT
Square Chase-Top
with Slip Section
7" to 15"*
ETLO-8DM
Square Chase-Top
with Mesh & Slip
Section
12" to
25
1
/
2
"*
* The lineal gain for the terminations is mea
-
sured to the flue gas outlet height.
Hemmed
End
8" Stainless
Inner Pipe
12
3
/
8
"
Galvanized
Outer Pipe
Figure 7 - Outside Air Kit
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required for
Wall Installation
Air Inlet
Eyebrow
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)
VenTing inSTallaTion
OPTIONAL OUTSIDE AIR KIT
(MODEL AK4/AK4F)
Installation of outside air kit should be per
-
formed during rough framing of fireplace due
to the nature of it's location. Outside combus
-
tion air is accessed through a vented crawl
space (AK4F) or through a sidewall (AK4).
See Figure 24 on page 15 for instruction of
operating air kit.
CAUTION: Combustion air
inlet ducts shall not terminate
in attic space.
CHIMNEY PIPE
DESA Heating, LLC chimney system con
-
sists of 12", 18", 24", 36" and 48" snap-lock,
double-wall pipe segments, planned for
maximum adaptability to individual site re
-
quirements. Actual lengths gained after fitting
overlaps must be taken into consideration
(lineal gain) and are given in lineal gain chart
(see Figure 8).
Lineal gain is actual measurable length of a
part after two or more parts are connected.
WARNING: The opening in
collar around chimney at top of
fireplace must not be obstructed.
Never use blown insulation to fill
chimney enclosure.
