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2.1 Recommendations for the chimney
Correct operation depends on the chimney draught. Tips for optimal performance:
- The wood burner must be connected to a flue that guarantees sufficient chimney draught (at least 12 Pa).
- The flue must have sufficient height (not less than 4 m) and should extend at least one meter beyond the maximum
height of the building and other surrounding buildings, trees and other obstacles in a minimum radius of 10 m.
- The diameter of the flue of the appliance is ideal for keeping a good draught; do not reduce said diameter if at all
possible.
- Do not connect several appliances to the same chimney.
- The chimney should run through the interior of the building. Install insulated double-walled pipes when the chimney
flue runs outside the building.
- When the flue has to have angles or bends, avoid horizontal or downward sections. You must plan for the cleaning
of the flue and, if necessary, install pipes with access holes or cleaning hatches in sections that are not easily
accessed.
- When a metal chimney is fitted inside a brick chimney, it must exceed the height of the latter and protrude a few
centimeters at the top.
- The installation of the pipe and cap must strictly prevent water from getting into the appliance on rainy days. Water
causes more damage to wood burners than the high combustion temperatures for which they are prepared.
- When the pipes run through the inside of the home or a brick chimney, they should be mounted as shown in Figure
1 to prevent liquids produced by the condensation of the gases flowing through the joints and out of the pipes. If
a pipe section runs outside the building it must be mounted in the direction shown in Figure 2 to prevent rainwater
draining down the outside part of the pipe and entering into the pipe interior through the joints.
Figure 1: correct installation running on
house interior. Liquids produced by gas
condensation do not flow to the exterior
through the pipe joints
Figure 2: correct installation for parts
running on house exterior. Rainwater
does not reach the inside of the pipe
through the pipe joints
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