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Thank's for the input. I will probably run a single rectangular duct directly back of the hood to the outside and have a custom made wall cap made up. I wasn't sure if there could have been any wind speed issues or turbulence from one big vent...But i guess that with only about 5" to go...

Hello, I need some info on ventilation considerations for my kitchen range hood. I have a 1000 CFM blower that needs to vent outside. I am mounting the hood on an exterior wall to have the shortest duct lenght. The manufaturer of the hood recommends 10" round duct. But the hood itself has a...

What are the most realistic calculations one can do in order to determine the required vertical or horizontal (or both)separation to fulfill a given isolation need? Is there a way to incorporate the antenna radiation pattern of both antennas so as to have a better estimate?

Is there a tool that can model the effects on the radiation pattern of a omnidirectional antenna placed on the side of a telecom tower? Are there critical distances(in function of wavelenghts) to avoid in placing the antenna? Most antenna manufacturers give these "distorted" radiation...