Enerzone Cambridge EP00075 Installation And Operation Manual page 16

Here is an example to help you calculate Equivalent Vent Length. On the following figure the EVL can
be calculated like this:
• 2 horizontal run of 1' = (2 X 1') X 1' = 2' of EVL
• 1 elbow 90° or "Tee" = 5' of EVL
• 3 vertical length of 4' = (3 X 4') X 0.5' = 6' of EVL
• Total EVL = (2' + 5' + 6') = 13'
Since the total EVL is less than 15 feet, the recommended exhaust venting diameter is 3".
DO NOT INCLUDE THE EXTERIOR WALL TERMINATION IN THE
EVL CALCULATION (45° ELBOW AND TERMINATION COLLAR).
16
NOTE
Cambridge Pellet Stove Installation and Operation Manual