Arkansas HVACR NewsMagazine November 2021

HVACR NewsMagazine November 2021

Tech News

Now it’s time to test/measure. Most technicians are going to test airflow by using static pressure and a fan table. This method is perfectly fine so long as the technician understands that a static pressure reading and fan table will give only an approximation for airflow in a system. Static pressure is valuable because we can determine whether or not the total system static pressure is within

range for the system’s design. We can also see whether there might be an issue on either the return or supply side of the ductwork. In relation to the condensate side of the system, a return static pressure 0.4” w.c. and above can cause condensate to be picked up by the blower and slung around the cabinet.