You can get slim range hoods that generally fit into the wall cabinets ours were approx 40cm deep which housed the complete operation, our plumber ran a 6 or so inch flexable ducting into the roof cavity and out under the eaves. Most brands make these. A photo would be helpful. https://www.thegoodguys.com.au/omega-52cm-undermount-rangehood-oru50x?CAWELAID=620013790000422290&CAGPSPN=pla&CAAGID=21711678566&CATCI=pla-376401441757&gclid=CjwKCAjw0qLOBRBUEiwAMG5xMNN63iJr0n0Bnxf31-Gt0t5s0vERt_lOwOYkC6uzovf9TDWwawry9RoCgxQQAvD_BwE&gclsrc=aw.ds&dclid=CLOv9erawdYCFc0slgodE5oLHg Where we didn't have wall cabinets we had tall boxes of stainless look laminate built up to the ceiling which contained the extraction unit, which was approx 30-40cm's and extraction ducting cheers

Hi Linda, if I understand you correctly, what you are looking for are "Undermount Range Hoods". If you do a search with this term, you should find links to numerous different manufacturers as well as retailers. Hope this helps. Regards Malcolm.

Here’s a suggestion: http://www.suncoastsheetmetal.com.au/cms/index.php/domestic/kitchens.html

My family is looking to buy a new range hood. Ours right now is just too weak, it doesn't really suck air out. What do you guys/gals recommend? We've looked around and saw this one: Broan 413004 ADA Capable Non-Ducted Under-Cabinet Range Hood Do you think it's good? Any opinions? Thanks!