Positive pressure question
I totally agree with what you're saying in that a positive pressure system is better, I just don't know how to create it. I'm currently designing my darkroom and the whole ventilation (and room temperature) system is the one I need most help with. I of course want to put an exhaust above and real close to the sink (thinking of using a Doran A1212 fan) and then using one or two louvers in the opposite wall so as not to create a vacuum. So I feel I'm creating a negative pressure environment which is what I don't want.
Originally Posted by Nicholas Lindan