[mtumbleson]

Does anyone know of an “on line” calculator I can use to determine the proper duct size to use with my draft fan in my oven (or just clue me in). I don’t know anything about air hydraulics, but I do know it’s important to get the duct size correct in order for the fan to operate properly.

I think I’ve come up with a slick idea for drafting the hot air from the top of the oven then depositing the air in the bottom over the elements. At this point I think I will mount my fan at the top of the oven. The inlet opening will be the same size as the opening in the fan, only having to travel 4 inches (The thickness of the wall).

It will circulate through the fan then into a duct made from sheet metal running down the inside of the oven. It will be reheated on its way down the duct before it is exhausted at the bottom.

I have a fan rated for this type of application I just need to determine the duct size. Can anyone clue me in on how to get this right?

Thanks