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?