8
FIGURE 8
EQUIVALENT VENT LENGTH EVL
e longer the run of pipe in your installation (both with insert and freestanding), the more restriction there is in the system. ere-
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’ of EVL.
• Recommended vertical runs to be 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.
FREESTANDING INSTALLATION
A. HORIZONTALLY THROUGH WALL (refer to Figure 8)
NOTE: 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 gure 5).
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 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 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. Mobile home installations must use a spark arrester.
INSTALLATION
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