Hi Jon, Interesting info as always, but there may be a concept flaw slipping into your clean room installation. The basic principle is that it should be kept in overpressure compared to the surrounding rooms and balanced ventilation is even aimed insufficient. If you place 3 large flow fans outside the clean room you will create negative pressure in the clean room which is undesirable and draws dust in. A differential manometer could illustrate the problem or perhaps the coffee smell from the adjacent factory. Of course, noise pollution is also a real problem and unlike some subtle pressure differences, it will be noticed immediately. Dust accumulation will not be noticed initially either. Greetings

Thanks! Another great stream. 👍