Owner's Manual

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

FIGURE 5