Kusten, the inlet pipe is usually fitted under the floor, when supplying an island hob. Or if the hob is close to an outside wall then through the wall directly behind the hob. I find it works best,when the air can rise all round the hob. It is not linked to the extractor, if you have a very powerful extractor, and therefore need a lot of make-up air, then inserting a fan in the pipe, a fan with the same capacity in cubic feet will solve the problem. As normally fitted, extractor fans, without make-up air provision, pull outside air from wherever they can get it. Mainly badly fitting doors and windows. This causes drafts and means you are loosing your expensively warmed air blown from the room and replacing it with cold outside air, which you then have to heat. The extractor has to pull quite hard to get the large volume of cold air it requires from outside through a narrow crack or gap round a badly fitting door. make-up air arriving through a six inch diameter pipe has a much easier path and that's the way it will arrive. You will instantly notice the difference, your kitchen will be warmer and your heating bills lower. So called extractor fans that don't exhaust to the outside are a joke. All they do is filter out grease in a block of carbon. All the water vapor that is produced by burning gas and cooking remains in your home. The first law of thermodynamics is that heat always moves to cold. Pushing hot wet air into an unlined chimney or cavity is asking for trouble. As the water vapor instantly condenses on the first cold surface it meets. A cold wet wall/chimney provides an express route outwards for your expensive heat. All modern insulation works by trapping air in small cavities, air in a space smaller than 19mm does not allow rotation and therefore does not pass heat by circulation. A damp chimney quickly and permanently passes heat from the room into the chimney and up into the sky. You don't want this to happen.

Hi Alant1000, An extractor not only helps to remove odours from cooking but it also makes cleaning the kitchen easier, removing some of the grease that would otherwise settle throughout the room. Extractors do however come in many shapes and sizes, in terms of aesthetics you could opt for a pendant extractor which appears as a pendant light or you could choose a downdraft extractor, which will be hidden within the worktop. It's difficult to give you a definitive answer but we certainly design all our clients' kitchens with appropriate extraction. If you would like more information about the importance of extraction and the different options there are for extractors please do read our blog - Extraction: the secret to a clean kitchen and odour-free home. Hope this helps. Kindest regards, Davonport.

I’ve always liked the look of Lacanche and they now do ones with induction hobs and a more streamline style. Comes in lots of colours too. I’ve never used one though!

Thanks jonathan. the breast wall hasnt been built as yet, the builder said there are no brackets with the extractor so in order to make it fit he would have to build a timber housing unit and then build the breast wall around that, and that just seems a lot of work so i thought i must have bought the wrong one? its been a lot of drama over an extractor!