f) It is very important to ensure that the joints of the pipes are well sealed to avoid
possible cracks through which air may enter.
Fig.-6
In order to verify the air-tightness of the chimney, you may:
- Cover the outlet on the roof.
- Introduce damp paper and straw at the bottom of the chimney and light it
up.
- Watch for possible cracks through which smoke leaks out and seal them.
Fig.-7
g) The chimney should be one metre higher than the highest part of the
house. If you need to increase the draw, extend the length of the chimney.
Fig.-8
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