Spiral Duct Sizing Calculator.

With this tool, you can quickly and easily verify if the size of your spiral ducting is suitable for both kitchen extract and supply air main run velocities. Proper duct sizing is essential to ensure efficient air flow and ventilation in your kitchen space. Simply enter the relevant parameters, and our calculator will provide you with the necessary data to determine if your duct size meets the recommended velocities.

We’ve added the most popular duct sizes for ease

Spiral Size

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