All of our range hoods include at least one fan motor - so they do not require any additional parts for installation. (except for Some of the Broan models.
Please check to see which Broan model sells the motor separately. www.Broan.com)
The customers provide their own vent pipe and terminus on roof or outer wall. Since building codes vary from one town to the next, we do not sell vent pipe or terminus parts - you can find these parts at your local plumbing supply store.
Unless local code requires otherwise, we normally install single wall galvanized Type B gas vent pipe, which is thinner than comparable wood stove vent pipe. While corrugated "flex" pipe may be cheaper and easier to bend, it tends to trap grease (harder to clean) and is not as reliable (easy to tear).
At best, dirty dampers restrict air flow ... at worst, corrosion and grease buildup eventually renders them inoperable. Note, all Kobe hoods utilize three sided adjustable duct covers (side facing wall is open), which allow you to install a 90 degree bend in the vent pipe and go straight out the wall the hood is mounted upon.
Please see www.koberangehoods.com. Note that rectangular venting is fine for short distances and often found in remodels, but round kitchen hood vent pipes are much easier to clean and generally have better aerodynamics. In homes, where straight vertical (up through the roof) venting is not possible, it is best to install a series of 45 degree bends.
When forced to install right angle bends, avoid placing the first 90 within two feet of fan, avoid using more than two 90s, and avoid horizontal runs greater than twenty five feet. To do otherwise, cuts down on the efficiency of range hoods, from any range hoods manufacturer. Lowered efficiency (less cubic feet per minute CFM) is a function of aerodynamic drag in the pipe - backpressure from bends and horizontal runs force the fan work harder for the same CFM.
Please see the CFM efficiency on each brand: www.Broan.com, www.koberangehoods.com, www.zephyronline.com , www.nutone.com , www.vikingrange.com , www.euro-kitchen.com . And no, we do not have any estimate of the amount of CFM loss per bend or run, but we will add that information as soon as we can authenticate it. In the end, you make due with what you have to work with in the home ... any hood from any manufacturer is going to have the same aerodynamic limitations.
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