Basic Principle of Air Handling Unit (AHU)

Question 1

A factory-made encased assembly
consisting of a fan or fans and
other necessary equipment to perform one
or more of the functions of circulating,
cleaning, heating, cooling, humidifying,
dehumidifying and mixing of air

Answer 1

Air Handling Unit

Question 2

The AHU is
used to control
the following
parameters

Answer 2

• Temperature
• Humidity
• Air Movement
• Air Cleanliness

Question 3

the heart of central airconditioning

Answer 3

Air Handling Unit (AHU)

Question 4

It collects outside air and room air, removes
dust and other particles from the collected air,
adjusts the temperature and humidity and
then supplies comfortable and refreshing air
conditioned air into the rooms through ducts

Answer 4

Air Handling Unit (AHU)

Question 5

HVAC

Answer 5

Heating, Ventilation, and
Airconditioning

Question 6

used for measurement of temperature of a room, Air
Duct, Hot/Cold Water, Outside air.

Answer 6

Temperature Sensor

Question 7

used for measurement of Relative Humidity of room,
Air Duct, Outside air.

Answer 7

Relative Humidity Sensor

Question 8

used for measuring diff. pressure,
positive pressure and vacuum

Answer 8

Differential Pressure Sensors/Transmitter

Question 9

Generally located in the
discharge air stream.

Answer 9

Coils

Question 10

Types of valves

Answer 10

2 way or 3 way

Question 11

Types of Actuator

Answer 11

motorized, magnetic, pneumatic