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1.6
Ventilation
(Residential homes which do not require an outside air inlet). Ventilation is essential when using a solid fuel stove. The
combustion process uses oxygen from inside the home, and it may be necessary to open a window or install a vent to pro-
vide combustion air in a house that is well insulated.
1.7
Fresh Air
In all manufactured homes and in many site-built residences (subject to local code), a stove may be required to use outside
air for combustion.
The possible effects of room air starvation, icing, exhaust fans, etc. and the need for adequate ventilation.
The following is not mandatory, but may be included for information. Provision for outside combustion air may be neces-
sary to ensure that fuel-burning appliances do not discharge products of combustion into the house. Guidelines to deter-
mine the need for additional combustion air may not be adequate for every situation. If in doubt, it is advisable to provide
additional air.
a) Outside combustion air may be required if:
1. The solid-fuel-fired appliance does not draw steadily, smoke rollout occurs, fuel burns poorly, or back-drafts occur
whether or not there is combustion present.
2. Existing fuel-fired equipment in the house, such as fireplaces or other heating appliances, smell, do not operate
properly, suffer smoke roll-out when opened, or back-draft whether or not there is combustion present.
3. Opening a window slightly on a calm (windless) day alleviates any of the above symptoms.
4. The house is equipped with a well-sealed vapor barrier and tight fitting windows and/or has any powered devices
that exhaust house air.
5. There is excessive condensation on windows in the winter.
6. A ventilation system is installed in the house.
b) If these or other indications suggest that infiltration air is inadequate, additional combustion air should be provided
from the outdoors. Outside combustion air can be provided to the appliance by the following means:
1. Direct connection: appliances can only use direct connection of outside combustion air if they are certified for the
type of installation. Installations shall comply with the manufacturer's instructions.
2. Indirect method: for an appliance not certified for direct connection of outside combustion air, the outside air is
ducted to a point no closer than (12 in.) 300 mm from the appliance, to avoid affecting the performance of the ap-
pliance.
3. A mechanical ventilation system: if the house has ventilation system (air change or heat recovery):
a. The ventilation system may be able to provide sufficient combustion make-up air for the solid-fuel-fired appli-
ance.
b. The householder should be informed that the ventilation system might need to be re-balanced by a ventilation
technician after installation of the appliance.
NOTE: Because the base sits 1" (25.4 mm) off the floor, the outside air floor duct can be positioned along the front to rear
center line under the pedestal, but as close to the opening in the base as location permits. The outside air floor duct opening
must be protected from any possible obstruction including loose floor insulation.
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