I recently had a large renovation project carried out and electrical work by the builders own electrical contractor. I have a problem with my chimney extractor over gas hob...it's not extracting sufficiently and smoke is filling the room. There are no blockages and we now think it is because the 4 inch ducting is under specced. The cooker hood manual specs 5 inch ducting. The architect specified 30l/s fan but not the type of extractor/ducting. I supplied the electrician with kitchen plan and we had a discussion about the extractor. I offered to supply ducting kit but he said it was not required. The builder said they always install 4 inch ducting as standard and that it was my responsibility to let them know if I required larger ducting. This was a 3 metre run with at least x2 90 degree bends vanting out of a flat roof?.
What do electricians normally do if kitchen is not on site? Do you calculate based on the distance? Do you check the type of extractor to be installed and go by manufacturers specs? Do you install 4 inch as standard?
What do electricians normally do if kitchen is not on site? Do you calculate based on the distance? Do you check the type of extractor to be installed and go by manufacturers specs? Do you install 4 inch as standard?
