I much enjoy reading and following the posts. I hope to someday be able
to put many of the tips to use. As for now I make my living doing
commercial HVACR (Heating, Ventilating, Air Conditioning, and
Refrigeration).
Please consider that with every Exhaust of air that air needs to be
replaced, otherwise, a “negative” is established that tends to hold in
contaiminents. That replacement air is referred to as Makeup Air.
Requirements for MakeUpAir (MUA)vary depending on:
How tightly sealed the bluiding/area is
Any combustion (Gas Furnaces etc. (consume Oxygen))
any exhaust (bathroom fans, kitchen vents, clothes driers, etc
Chiminey effect (Hot air rises out a “chimeny”)
A good rule of thumb would be to provide a larger size inlet where the
air moves past you towards the exhaust fan. This has the benefits of
moving the fumes away from you and providing for a good level of Fresh
MUA and helping to keep a healthy level of Oxygen in the air.
The air flow pattern can be tested through the use of smoke, candle
flame etc.
Hope this gives you all a good starting point for a healthy workbench
etc.
Dan in the Midwest Sauna,
Indpls