1. The furnace must be located on a noncombustible floor
2. For greenhouse installation it is recommended to locate furnace on the naturally coldest end of green-
house. (north or west) If greenhouse is sloped, place furnace at lowest end of greenhouse. Installing an air tun-
nel with a fan is the optimal way to circulate air. Any horizontal or ceiling fans will help. When fans are not an
option try installing 2 pieces of tin on top of furnace. Start up 16” from back top edge of furnace and run 16' of
tin, 2 pieces wide, up into the peak of the greenhouse. This will help start your natural circulation.
See drawing below.
3. For building installation. It is recommended that the furnace be centrally located in the building in such a
way that air can naturally circulate around furnace and around the whole building. If this is not and option it is
recommended to install fans to circulate the air. See drawing on page 5.
4. You must follow all clearance to combustibles.
5. Connection of the furnace to the chimney should
be made as directly as possible (6 feet maximum hori-
zontal) and not more than two bends, when needed,
should be used. No reduction in flue pipe below 10
inches in diameter should be used. The single wall
chimney connector connecting the furnace to the chim-
ney should be at least 24 gauge. Thicker gauges are
available and will resist corrosion longer and need
fewer replacements. Slope the flue pipe back towards
the furnace, 1/4” per foot of horizontal run. That way if
any condensation forms in the pipe it will be carried
back into the furnace. The connector pipe should be in-
stalled so that the upper pipe section fits inside the
lower section. This way any condensation 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. Particular attention should
be paid to the point where the flue passes through a
wall or ceiling. This penetration should always be
made with a thimble, insulated pipe, and then proper
accessories following manufacturers instructions.
Chimney connectors must not pass through the ceiling,
concealed spaces, or enter the chimney in the attic,
unless proper clearance or insulated pipe is used following manufacturers
instructions.
REMEMBER
that all single wall chimney connectors should be connected with at least 3 sheet
metal screws per joint. A fire in the stack may cause vibration and poorly fastened single wall chimney connec-
tors may come apart causing an extreme fire and smoke hazard. Do not extend single wall chimney connector
past the inside edge of the flue liner. If you have a manufactured Stainless Steel chimney, attach single wall
chimney connectors to single wall chimney connector adapter. Where the single wall chimney connector con-
nects to a masonry chimney, the flu to the chimney should be larger than the stove single wall chimney connec-
tor so you can insert the single wall chimney connector out to the inside edge of the chimney, but not past.
Locating Furnace
When possible, locate furnace on north or west end of greenhouse.
Above drawing shown with outside fire door.
Optional 2 pieces of tin, 6’ wide x 16’ long at an angle above furnace
to enhance natural circulation.
36” minimum
height above peak
10” Exhaust
4
