Venting Installation - Desa (V)B36 Owner's Operation And Installation Manual

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.
The maximum height for the
air vent can not exceed 3 feet
below the flue gas outlet of the
termination.
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)
Figure 7 - Outside Air Kit
CHIMNEY PIPE
FMI PRODUCTS, LLC chimney system
consists of 12", 18", 24", 36" and 48" snap-
lock, double-wall pipe segments, planned
for maximum adaptability to individual site
requirements. Actual lengths gained after fit-
ting 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.
109034-01M

VENTING INSTALLATION

Air Inlet
Location
Must Allow
For Bushes
or Snow
Air Inlet
Eyebrow
Vent Hood
Required for
Wall Installation
www.fmiproducts.com
WARNING: The opening in
collar around chimney at top of
fireplace must not be obstructed.
Never use blown insulation to fill
chimney enclosure.
12 / "
3
8
Galvanized
Outer Pipe
8" Stainless
Inner Pipe
LINEAL GAIN
PART NO. DESCRIPTION
36"
12-8DM
Pipe Section
12-8HT
18-8DM
Pipe Section
18-8HT
24-8DM
Pipe Section
24-8HT
36-8DM
Pipe Section
36-8HT
48-8DM
Pipe Section
48-8HT
RT-8DM Round Termination
RTL-8DM Round Termination
RLT-8DM Round Termination
Round Termination
RTT-8DM
with Slip Section
Round Termination
RTTL-8DM
with Slip Section
Round Termination
RLTT-8DM
with Slip Section
ET-8DM Square Chase-Top
Square Chase-Top
ETO-8DM
Square Chase-Top
ETL-8DM
with Slip Section
Square Chase-Top
ETLO-8DM with Mesh & Slip
* The lineal gain for the terminations is
measured to the flue gas outlet height.
Figure 8 - Lineal Gain
Hemmed
End
GAIN
Fireplace 37
10
16
23
34
46
6
7
7
6
23
8
21
7
21
with Mesh
7" to 15"*
12" to
25
Section
/ "
1
2
/ "
5
8
/ "
5
8
/ "
5
8
/ "
5
8
/ "
5
8
/ "*
7
8
/ "*
3
4
/ "*
1
2
/ " to
7
8
/ "*
1
8
/ " to
1
2
/ "*
1
2
/ " to
1
2
/ "*
1
4
12"*
12"*
/ "*
1
2
7