6
EQUIVALENT VENT LENGTH (EVL)
The longer the run of pipe in your installation (both with inserts and freestandings), the more restriction there is in the system. There-
fore, 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 feet of EVL.
•
It is recommended that vertical runs be a minimum of 8 feet.
•
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.
INSTALLATION
A.
HORIZONTALLY THROUGH WALL (refer to Figure 6)
NOTE: See
“VENTING”
and follow L-Vent chimney manufacturer’s instructions.
1. Position stove, adhering to clearances shown in Figures 1 & 2.
2. Locate position of hole in wall; directly behind stove exhaust vent (refer to
fi
gure 4).
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 pos-
sible to reduce the possibility of smoke spill age 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. Ex-
haust gases can reach temperatures of 500ºF and cause serious burns if touched.
Locate terminations: a) not less than 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.
INSTALLATION
INSTALLATION
FIGURE 6
