Calculate Ideal Pipe Size

How Pipe Size Affects Pressure

The more narrow a pipe is, the higher the speed (velocity) the air will need to travel in order to get to the demand side. However, due to friction and restriction, as velocity increases, the pressure decreases. Therefore, to ensure you do not have unnecessary pressure drops downstream, you will want to ensure you have the proper pipe size/velocity.

What Velocity Do I Want?

Ideally in your main header, you do not want your velocity to exceed 20 fps. Downstream, closer to point of use, this can be slightly higher, but still you do not want it to exceed 30 fps.

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