Equivalent Vent Length (EVL)
The longer the run of pipe in your installation, the more
restriction there is in the system. Therefore, larger diameter
pipe should be used.
•
Use 4” pipe if you have more than
15 feet
of equivalent
vent length.
•
Horizontal runs shall not exceed 10’ of EVL.
•
Recommended vertical runs to be a minimum of 8’.
•
To calculate EVL, use the following conversions:
90º elbow or “T”
= 5 equivalent feet
45º elbow
= 3 equivalent feet
Horizontal Pipe Run
= 1 equivalent foot per actual
foot
Vertical Pipe Run
= 0.5 equivalent foot per actual
foot
NOTE: At altitudes above 3,000 feet, we suggest the use of 4”
diameter vent at an EVL of 7 feet or more.
BIG E INSTALLATION
A.
HORIZONTALLY THROUGH WALL
(refer to Figure 5)
NOTE:
Follow L-Vent chimney manufacturer’s instructions.
1.
Position stove, adhering to clearances shown in Figure 1.
2.
Locate position of hole in wall; directly behind stove
exhaust vent (refer to figure 3).
3.
Always maintain 3” clearance from combustible materials.
4.
Install L-Vent wall thimble per L-Vent manufacturer’s
instructions.
5.
Attach enough piping to penetrate and extend at least 6”
beyond exterior walls. An 8-foot vertical pipe run is
suggested where possible to reduce the possibility of
smoke spillage in the event of a loss of negative pressure.
6.
Attach cap and seal outside wall thimbles with non-
hardening waterproof mastic.
7.
Termination should not be located so that hot exhaust
gases can ignite trees, shrubs, or grasses or be a hazard
to children. Exhaust gases can reach temperatures of
500ºF and cause serious burns if touched.
Locate terminations: a) not less then 3 feet above any
forced air inlet located within 10 feet; b) not less than 4 feet
below or horizontally from, or one foot above, any door,
window or gravity air inlet into any building; c) not less than
two feet from an adjacent building and not less than 7 feet
above grade when located adjacent to a public walkway.
Mobile home installations must use a spark arrester.
INSTALLATION
7
FIGURE 5
