In a series circuit (loads connected in a row end to end), it's easy to calculate total circuit resistance because you simply add up all the resistances to get the total. In a parallel circuit, the voltage is the same across all the loads; the amperage is simply added up, but the resistance is a […]

Many installers and service technicians know how to read and use a manufacturer fan table, but this is a quick review with a few extra tips for newer techs. It’s also a good reminder to senior technicians about how this easy-to-use practice can also be easily abused. At installation, properly setting up airflow is imperative to the […]

Have you ever thought about the relationship between velocity and pressure? If you think about a fluid being forced through a small orifice, you can fairly easily picture the fluid speeding up as it goes through the orifice. However, did you also know that the surrounding static pressure DECREASES at the point of high velocity? […]