Operating instructions

Heatmax Furnace Installation and Operation Manual
39
- The opening of a window, even slightly, in calm weather (windless), eliminates every
problem mentioned above ;
- The house is equipped with a tight vapour barrier and adjusted windows, and/or is
equipped with an interior air mechanical evacuation device ;
- There is excessive condensation on the windows in winter; and
- The house is equipped with a ventilation system.
If, according to these symptoms or other similar ones, there is insufficient combustion air, it
is necessary to ensure an additional combustion air supply.
Additional combustion air can be provided following the following methods, provided that
they satisfy chapter 4 of the CSA B365 standard for Canada:
- Direct connection: solid fuel units can be connected directly to a source of new
combustion air only if they are certified for this kind of installation, which must respect
the manufacturer’s instructions.
- Indirect method: new combustion air can be brought into a pipe located within
approximately 300mm (12 inches) of the unit. If the pipe is too close to the furnace, it
may interfere with its operation.
- Mechanical ventilation system: if the house is equipped with a ventilation system (air
exchanger or heat recovery), the ventilation system may provide sufficient auxiliary air
to the solid fuel unit. Otherwise, the owner should be informed that the ventilation
system may have to be rebalanced by a ventilation technician after the installation of
the solid fuel unit.
WARNING: SUFFICIENT COMBUSTION AIR MUST BE AVAILABLE AT ALL TIMES;
LACK OF COMBUSTION AIR CONSTITUTES A DANGER.
NOTE:
It is recommended to install an outside
air inlet with a diameter of at least 4
inches in the room where the heating
appliance is installed (see drawing next
page). It is preferable to choose a wall
which is not exposed to dominant winds,
depending on the conditions surrounding
your house.
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AIR SUPPLY
INSULATED PIPE
EXTERIOR WALL
AIR INLET