Hvac Duct Static Pressure Measurement

You begin to see that the duct system is what controls comfort and efficiency.

Hvac duct static pressure measurement. Measuring static pressure is a fundamental part of diagnosing how a duct system is performing. The pressure reading at the furthest air register from the furnace or air handler must be equal to the pressure measured at the closest one. The push of the air must be greater than the resistance to the flow or no air will circulate through the ducts. The result of measuring static pressure is the ability to prescribe duct renovation work.

Simply put static pressure refers to the resistance to airflow in a heating and cooling system s components and duct work. Static pressure static pressure is the resistance to airflow from objects in the air stream filters coils heat exchangers registers grills balancing dampers and of course the duct itself are just a few after the resistance of these objects is subtracted the balance is what is available for the duct system. Hvac static pressure checklist. It s kind of like getting your blood pressure tested when you go to the doctor at this point in time david pulled a digital manometer with two static pressure probes out of his instrument bag.

Only by getting the ducts operating properly can you assure the system as a whole is operating properly. Contrary to what we might imagine air is really heavy. Static pressure is one of the most important factors in hvac design. One pound of air at sea level is the size of a cube measuring 2 5 square feet on each side.

Static pressure is a measurement of how hard a fan has to work to move airflow through a duct system. Main supply duct must get smaller as branch lines take off. This conversation might expose some comfort problems that they are experiencing.