Although there is a rule of thumb that all power to electrical/electronic devices is assumed to be lost as heat, I am calculating greatly elevated theoretical temperatures vs. empirical data. I believe the cause of this disparity is that the assumption is overly conservative for switch gear...
What can one do when filter performance data is unknown? At best, I am told the filter will reduce airflow by 10% when clean and reduce airflow by 40% when dirty. At best, this is loose layman talk for there is no way to correlate this to a fan curve. Actual dP values at given flows would best...
