Total External Static Pressure Calculator
Total external static pressure sums the return, filter, coil, supply, terminal and accessory pressure drops the blower must overcome at design airflow.
total external static pressure calculator tesp calculator hvac static pressure calculator
TESP budget
TESP = return + filter + coil + supply + terminals + accessories
Blower margin
margin = available_external_static - TESP
Airflow dependency
Use pressure-drop values at the same airflow. Filter, coil, grille and duct losses change quickly when airflow changes.
Related pages
- Duct size calculator - round and rectangular duct sizing from airflow.
- Duct friction loss calculator - run-level pressure loss from duct size and length.
- HVAC static pressure calculator - total external static pressure and blower margin.
- Grille size calculator - face velocity and free-area checks for terminals.