Equivalent Vent Length (Evl) - Enerzone Euromax Owner's Manual

WARNING: DO NOT INSTALL IN SLEEPING ROOM
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANUFACTURED HOME FLOOR, WALL, AND CEILING/ROOF
MUST BE MAINTAINED
CAUTION: THE CHIMNEY CONNECTOR SHALL NOT PASS TROUGH AN ATTIC OR ROOF SPACE, CLOSET OR
SIMILAR CONCEALED SPACES, OR FLOORS, OR CEILINGS.

1.6.1. Equivalent Vent Length (EVL)

The longer the run of pipe in your installation, the
greater the restriction in your system.

Always use 4" pipe

Horizontal runs shall not exceed 9 feet.

Never exceed 30 feet of EVL..
To calculate EVL, use the following conversions table:
Qty Type of pipe
1 90° elbow or "T"
1 45° elbow
1 ft Horizontal pipe run
1 ft Vertical pipe run
Here is an example on how to calculate the EVL of
your installation. (See Figure 10):
(3 x 4' of vertical length = 12' x 0.5 = 6 EVL) +
(1 x elbow or "T" = 5 EVL) +
(2 x 1' of horizontal length = 2 EVL)
Total EVL = (6 + 5 +2) = 13.
EVL equivalent(ft)
5
3
1
0.5
FIGURE 10
Venting through wall