For many years we had a gas cooker in a small utility room with no extractor which led to much condensation and dampness on the walls etc. Time has come to replace the cooker and we intend to get an extractor fitted but the hole in the wall to be created will be some distance from the cooker. As we are pretty ignorant on these matters any advice would be appreciated especially the cost of installing the extractor hood..just an approx fig would be appreciated.