What are the advantages and disadvantages of implementing an outlet of a kitchen exhaust hood through a chimney or directly through the outer wall of the house? There are unused chimneys in the house but there is not a hole to one of them at the right place in the kitchen.
I think there could be differences in these parameters:
- heat leakage (the house is insulated by polystyrene foam boards from the outside)
- staining of the house wall
- complexity and price of the maintenance
- difficulty and price of the construction
If the chimney will be unused is it worth to enclose the open top end because of lower heat leakage and easier maintenance?
Best Answer
A hole in a wall is less likely to leak than a hole in the roof. Furthermore, when a hole in the wall leaks, it is likely to produce fewer problems than a leaky hole in the roof.
In the future, during reroofing, unused chimneys might be removed, and the associated hole in the roof along with them.