Chimney Draft Requirements:
Chimney draft is the measurement of the pull or vacuum created by
the chimney. It can be measured with a manometer and is expressed in inches of water (inch wc). To
measure you need to drill a small hole in the stovepipe between the flue collar and any stovepipe
dampers installed into the stovepipe system. Insert the manometer connection into the hole and note
the reading. Ideally you should have a reading of between -.03 and -.06 inches of water (inch wc). If
the chimney produces less than -.03 your fire can be very sluggish. In worst case instances
combustion byproducts like smoke and carbon monoxide can be expelled from the stove. This can
possibly create a very dangerous situation.
A draft of more than -.06 (inch wc) will waste some of your heat by causing it to be drawn up the
chimney too quickly. The higher the draft goes the more heat that is wasted up the chimney. A very
strong overdraft can also cause the stove to over fire. Over firing can cause the stove to develop
extremely high temperatures resulting in possible damage to the stove or a fire. Draft should never
exceed -.08 (inch wc). Over drafting can be controlled by installing a damper in the stovepipe. This
damper can be a barometric or manual damper. It is recommended to have this damper installed
during the stove installation. The damper may be installed in the vertical or horizontal portion of the
stovepipe. The stovepipe damper must be installed and calibrated according to the damper
manufacturer’s instructions.
CAUTION: BE SURE TO FOLLOW ALL CODES AND SAFETY REQUIREMENTS
WHEN INSTALLING THE STOVE.
CAUTION: THE USES OF ALUMINUM TYPE B GAS VENT FOR SOLID FUEL VENTING
IS UNSAFE AND PROHIBITED BY THE NATIONAL FIRE PROTECTION ASSOCIATION
CODE.
III. INSTALLATION OF STOVE
WARNING: THE INSTALLATION OF THESE STOVES MUST COMPLY WITH STATE
AND LOCAL REQUIREMENTS AND BE INSPECTED BY THE STATE OR LOCAL
INSPECTOR IF REQUIRED. NOTE: THESE STOVES ARE NOT APPROVED OR
RECOMMENDED FOR USE IN MOBILE HOMES.
CAUTION: DO NOT CONNECT TO ANY AIR DISTRIBUTION DUCT OR SYSTEM
Connection of stove to the chimney should be made as directly as possible and not more than two
bends when needed should be used. No reduction in flue pipe below 7 inches diameter for Model 354
and 6 inches for Model 254 heater outlet should be used. The pipe connecting the stove to the
chimney should be at least 24 gauge. Slope the flue pipe back towards the heater 1/4 inch per foot of
horizontal run, so that any condensation forming in the pipe will be carried back into the heater. The
connector pipe should be installed so that the upper pipe section fits inside the lower section. This way
the condensation, creosote or soot building up inside the pipe will stay inside the pipe as it flows down
the inside surface. Horizontal pipe runs should have the pipe seams turned up. Chimney connectors
must not pass through the ceiling, concealed spaces, or enter the chimney in the attic. If connection is
made through a combustible wall a listed and approved wall thimble/pass-through must be used
following the manufacturer’s instructions. Alternative site built pass-through options are on the following
page. REMEMBER, that all pipe sections must be connected with at least three sheet metal screws
