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  1. 21-01-2018 #2
    philgrady's Avatar
    Lives in Erdington, United Kingdom.
    philgrady
    Last Activity: 22-01-2018 Has been a member for 8-9 years. Has a total post count of 1. Received thanks 1 times, giving thanks to others 0 times.
    Hi,

    I suggest the following

    Face area of table 2.5M x 1.25M x 0.75 = 2.34m3/s or 8437.5 m3/hr

    That would give a fan and ducting size of 630mm diameter.

    The 0.75 m/s comes from the HSE recommendation for venting of plasma tables.

    I went for something smaller as I did not want to cut that size hole in the wall, so I went for 500mm diameter and uprated the fan to move more pressure. It's louder but I can vary the speed as required.

    I vented from under the table, to prevent the finish face from discolouring etc.
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