11
P
P
LANNING
LANNING
—
—
E
E
XHAUST
XHAUST
S
S
YSTEMS
YSTEMS
…
…
CONTINUED
CONTINUED
DETERMINE VENTING SIZE AND DISTANCE:
It is recommended that the vent system be installed with a minimum of three (3’) of vertical
rise above the appliance exhaust port.
Equivalent Vent Length
(EVL)
is the method of determining vent sizes and lengths, that takes into account the
effect of different component parts on air flow.
STEP 1
To help you determine the correct size and/or run, simply fill in the chart below.
Pellet Venting
Component
# of Elbows
OR feet of Pipe
Multiply by
Equivalent
Feet
Component
Equivalent
90 Degree or Tee
X
5
45 Degree
X
3
Horizontal Pipe
X
1
Vertical Pipe
X
.5
Total
Equivalent
Step 2
Ensure the Total Equivalent is or is
less than 30.
Step 3
Use the Sizing Chart to determine
the proper venting size according to
the Total Equivalent and the
Altitude above sea level.
NOTE:
In some cases it may be necessary
to contact Dansons Customer
Service personal to determine
acceptable
venting
configurations
and altitude adjustments
1-877-303-3134.
The diagram to the right will help to
give you a visual reference.
0 1 2 3 4 5 6 7 8 9 10
10
20
30
Altitude in Thousands of Feet
Eq
u
iv
a
le
n
t P
ip
e
L
e
ng
th
in
F
e
e
t
3 or 4 Inch Diameter Pipe
4 Inch Diameter Only
Use
Diameter “PL” Vent
If venting outside of
shaded area.
4”
0’
0’
5’
5’
10’
10’
15’
20’
25’
30’
33’
Vent must have a support
bracket every 5’ when on
the exterior wall.
Vent height and run
exceed the distance
shown in the un-shaded
region of chart.
must
not
To achieve optimum
performance, keep vent runs
as short as possible.
Especially on horizontal
installations.
Use or
Diameter
“PL” Vent, if venting in
shaded area.
3” 4”
Maximum venting height is 33’.
Maximum horizontal offset is 10’.
Use the Equivalent Vent Length
Chart to determine proper
combination of component parts.
Glow Boy Pellet & Biomass
www.glowboystoves.com 11
