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Flue Stack
The length and straightness of the flue stack are important to the efficient operation of the
heater. The Flue stack must be the correct diameter. If elbows must be used, the elbows
shall not be greater than a 45 degree angle. The first elbow should not be closer than 12”
(28cm) to the heater. Allow for as much straight pipe as possible before the first elbow.
The pipe will attach to the heater by squeezing the round pipe over the
oval flue collar when installing.
Pipe Diameter 3 inch dia. 7.6cm
Recommended Length 6 ft 1.83m
Minimum Length 4 ft 1.23m
Hole Diameter 5 inch dia. 12.7cm
A Barometric Damper is a MUST FOR BEST COMBUSTION.
The barometric damper should be installed in oil and solid fuel heaters/stoves. The
purpose is to maintain a strong draft without causing too much air to the fuel mixture.
When the damper is adjusted the draft is altered by allowing air to be pulled into the
chimney by the air inlet on the damper and not pulled into the primary mixing holes in
the burner.
Install the barometric tee pipe with the front flap facing fore and aft.
In order for the barometric to work efficiently it must be installed between 12” and 24”
from the heater exhaust collar. If using a pipe guard turn the barometric tee to the back as
it does not have to be seen to work.
To adjust the flap on the barometric back off the jam nut and turn the counterweight so
the flap is standing closed. The valve must be set to flow 1 teaspoon per minute of fuel on
the lowest setting. Once the heater has been burning for some time and the room
temperature is starting to rise is a good time to do the adjustment.
Adjust the counterweight so the flap starts to open (aprox 6mm or ¼”). This will allow air
to enter the barometric tee and reduce the air entering the burner. This will cause the
flame to burn above the top burner ring. If the flame is still burning below the ring adjust
the flap open another 3mm or 1/8”. At this time if there is flame burning below the top
burner ring and the barometric flap is open aprox 9mm or 3/8” do not adjust the flap open
any further and re-adjust the valve fuel flow rate until the flame is above the ring.
This adjustment need only done once after the install and the jam nut can be re-tightened.
