United States Stove 5040 사용자 설명서

7

INSTALLATION

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. 

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 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.

B. HORIZONTALLY THROUGH WALL (refer to Figure 9)

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 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 sug-

gested 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 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 in-

stallations must use a spark arrester.

VERTICAL ROOF VENT

WALL 

THIMBLE

6” MINIMUM CLEARANCE

TO ANY COMBUSTIBLE

SURFACE

CLEAN-OUT TEE

A 90 DEGREE ELBOW

MAY ALSO BE USED

WALL STRAP

SEE VENT MANUFACTURER

FOR NUMBER AND SPACING

TO

APPLIANCE

L-VENT 

ADAPTER

6” MINIMUM CLEARANCE