Hvac Duct Static Pressure Measurement

Collapsed duct liner or a closed damper can be found with static pressure strategically measured across portions of the duct system.

Hvac duct static pressure measurement.

Static pressure is one of the most important factors in hvac design. 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 result of measuring static pressure is the ability to prescribe duct renovation 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.

Contrary to what we might imagine air is really heavy. 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. 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.

Only by getting the ducts operating properly can you assure the system as a whole is operating properly. This conversation might expose some comfort problems that they are experiencing. You begin to see that the duct system is what controls comfort and efficiency. One pound of air at sea level is the size of a cube measuring 2 5 square feet on each side.

The push of the air must be greater than the resistance to the flow or no air will circulate through the ducts. If there are issues with the duct system let the homeowner know. Hvac static pressure checklist.