5. Don't forget compensation!
You must admit a quantity of air into a ventilated room roughly equivalent to the quantity of air extracted.
Various parameters, listed below, need to be controlled.
5.1 Quantity
It is close to the quantity extracted. Depending on the activity, it may be necessary to keep the ventilated area slightly over-pressurized (e.g. painting room) or slightly under-pressurized (e.g. specific pollution areas opening onto non-specific pollution areas).
5.2 The breakdown
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Don't forget compensation!
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