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DETERMINE VENTING SIZE AND DISTANCE:
It is recommended that the vent system be installed with a minimum of three feet (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.
Pellet Venting
Component
90 Degree or Tee
45 Degree
Horizontal Pipe
Vertical Pipe
Step 1
Complete table above.
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 Hearthland Customer
Service personnel to deter‐
mine acceptable venting
configurations and altitude
adjustments.
Call: 1‐888‐883‐2260.
Diagram for visual reference.
VS0952_E
E
S
XHAUST
YSTEM
# of Elbows
Multiply by
OR feet of Pipe
12/30/2009
(C
ONTINUED
Equivalent
Feet
X
5
X
3
X
1
X
.5
Total Equivalent
30
20
3 or 4 Inc h Dia me ter Pip e
10
0
1
2 3 4
5
Altitude in Thousa nds of Feet
)
Component
Equivalent
4 Inc h Dia me ter Only
6 7
8
9 10
11
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