Equally suitable for rear-vented freestanding rangehoods and top-vent wall mounted canopies when mounted on an outside wall, the wall kit is easy to install and effective. Depending on where you live, either a wall cowl or a vaned vent will be acceptable for building code with the wall cowl being the most common choice. The easiest ducting choice would be semi-rigid duct, which can be extended in length and bent to shape.
Wall Cowl and Vaned Vent
Incorporating a muffler on top of the rangehood over the outlet (the noisiest part), thiese kits are the quietest ducting solutions you can buy. Rangehood Tamer is available for roof or soffit ducting
With no acute bends to cause back pressure, this is the most efficient way to vent a rangehood. Roof venting allows the rangehood to operate to its full capacity by allowing the air free unrestriced passage.