Osburn Stoves by SB I HYBRID-45 MF - Manual (Page 7)

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 (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 exemple 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 allowed
INSTALLATION CONFIGURATIONS
A. HORIZONTALLY THROUGH WALL (refer to Figure 7 & 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 figure 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 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.
90 DEGREE ELBOW
45 DEGREE ELBOW
TERMINATION
COLLAR
WALL
STRAP
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
WALL
THIMBLE
CLEAN OUT
TEE
WALL
STRAP
CLEAN OUT
TEE
VERTICAL ROOF VENT
1' HORIZONTAL RUN EVL = 1'
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
1' HORIZONTAL RUN EVL = 1'
90° ELBOW "T" LEE = 5'
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
VERTICAL LENGTH4' EVL = 4 X 0.5' = 2'
COUPE-FEU
MURAL
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.
7
FIGURE 7
Venting through wall
FIGURE 8
Venting through wall
INSTALLATION 7