NATE - North American Technician Excellence Practice Test
NATE - North American Technician Excellence NATE Air Distribution
What does external static pressure (ESP) measure in an HVAC duct system?
Select your answer
A
Velocity of air at the supply registers
B
Total resistance to airflow the blower must overcome, measured in inches of water column
C
Duct leakage to outside
D
Return air CO2 concentration
Hint
