My head is spinning from all the reading and calculations about ventilation, not fumes! I swear I really was good in math but I am overwhelmed trying to figure all this out.
I have a 96 X 60 inch (8 x 5 foot) island workbench. I am going to build a hood to hang over the table and vent out the north side of the house with no bends. Passive makeup air will come in from that north wall as well moving over the table and out with the fumes.
The way I understand it is:
1. The hood can be a few inches less than the table as long as the flame is entirely under the hood.
2. 96 x 60 divided by 144 x 125 = 5000 cfms needed for the fan.
How high off the table does the hood need to be?
What else do I need to know?
