Drolet ECO-45 User Manual

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: 

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 allowed 

 
NOTE: Follow the vent 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 a wall thimble as per the 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. 

 

WALL

THIMBLE

CLEAN OUT
TEE

FOLLOW CHIMNEY OR 
VENT MANUFACTURER'S 
INSTRUCTIONS

90 DEGREE ELBOW

45 DEGREE ELBOW

TERMINATION 
COLLAR

WALL
STRAP

 

 

COUPE-FEU

MURAL

1' HORIZONTAL RUN EVL = 1'

1' HORIZONTAL RUN EVL = 1'

VERTICAL ROOF VENT

WALL
STRAP

CLEAN OUT
TEE

VERTICAL LENGTH4' EVL = 4 X 0.5' = 2'

VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'

VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'

90° ELBOW "T" LEE = 5'

FOLLOW CHIMNEY OR 
VENT MANUFACTURER'S 
INSTRUCTIONS

 

 

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.