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8
45 DEGREE ELBO
W
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
WALL
THIMBLE
TERMINATION
COLLAR
CLEAN OUT
TEE
WALL
STRAP
90 DEGREE ELBOW
Figure 7
Venting through wall
1' HORIZONTAL RUN EVL = 1'
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
VERTICAL LENGTH4' EVL = 4 X 0.5' = 2'
1' HORIZONTAL RUN EVL = 1'
90° ELBOW "T" LEE = 5'
CLEAN OUT
TEE
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
WALL
STRAP
VERTICAL ROOF VENT
WALL
THIMBLE
Figure 8
Venting trough wall
EQUIVALENT VENT LENGHT (EVL)
The longer the run of pipe in your installation, the greater the restriction in
the system. Therefore, larger diameter pipe should be used.
• Use 4” pipe if you have more than 15 feet of Equivalent Vent Length
(EVL).
• Horizontal runs shall not exceed 10 feet of EVL.
• To calculate EVL, use the following conversions table:
Qty Type of pipe EVL equivalent(ft)
1 90° elbow or “T” 5
1 45° elbow 3
1 ft Horizontal pipe run 1
1 ft Vertical pipe run 0.5
NOTE: At altitudes above 3,000 feet, we suggest the use of 4” diameter
vent at an EVL of 7 feet or more.
Here is an example on how to calculate the EVL of your installation. (See
Figure 8)
(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. So 3” diameter vent is acceptable.
INSTALLATION CONFIGURATIONS
HORIZONTALLY THROUGH WALL
(refer to Figure 7 & 8)
NOTE: Follow 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 figure 4).
3. Always maintain 3” clearance from combustible materials.
4. Install Vent wall thimble per 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.
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. Other restrictions may apply, such
as the need to maintain a minimum distance to a gas meter. US and
Canadian Standards may vary. Consult the vent manufacturer’s
instructions.