Let us study some photos and diagrams.
Indicate on the photo below the recognizable elements.
The identification of the coil of this unit is not obvious. The presence of a condensate drain means it is cold.
However, under our climate, it is rare that an AHU does not have at least one heating coil.
Name the numbered elements below.
The identification of the parts of this unit is not obvious, concerning the water humidifier n°4.
We will see in the E-book “Structure of Air Handling Units” that under our climate, water humidifier is in general placed after a first heating coil.