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Your KOZI pellet heater is certified for 3 and 4 inch exhaust venting. 3 inch venting is
normally sufficient for most direct vent installations. Installations with several elbows,
long horizontal and/or vertical runs may add too much resistance to air flow and may
create burn problems. The use of 4 inch venting in these types of installations will reduce
the possibility of burn problems. A simple technique called ‘EQUIVALENT VENT
LENGTH (EVL)’ can be used to determine whether 3 or 4 inch vent pipe should be used.
To calculate EVL use the following formula:
for each 90° Elbow or T fitting = add 5 EVL
for each 45° Elbow = add 3 EVL
for each Horizontal run of vent = add 1 EVL per foot of horizontal venting
for each Vertical run of vent = add 1/2 EVL per foot of vertical venting
CAUTION: EVL CANNOT EXCEED 25 ft. (7.6 meters). Installations
using an EVL exceeding 25 ft. (7.6 meters) are not permitted.
If in doubt, use 4” venting. This will reduce the possibility of future burn problems.
DO NOT CONNECT THIS HEATER TO A CHIMNEY
FLUE SERVING ANOTHER APPLIANCE
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST
VENTING SYSTEM OF THIS HEATER
DO NOT USE MAKESHIFT MATERIALS OR MAKE COMPROMISES
IN THE INSTALLATION. IT IS A FIRE HAZARD.
YOU MUST USE APPROPRIATE 4” VENTING IF:
The EVL is 7 or more AND you are at or above an altitude of 3000 ft.
OR
The EVL is 15 or more
OR
Your heater is an Insert
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