Lesson 3: Basic Principle of Air Handling Unit

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

Is the heart of central air-conditioning.

Answer 2

AHU

Question 3

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 3

AHU

Question 4

____________ will serve a specified area or zone within a building

Answer 4

AHU

Question 5

Component of AHU that will measure the how dirty the filters are and notify it’s time to replace the filters.

Answer 5

Pressure Sensor

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

____________________________ - are used for measuring diff. pressure, positive pressure and vacuum.

Answer 8

Differential Pressure Sensors/Transmitter

Question 9

Provide heating or cooling. Generally located in the discharge air stream.

Answer 9

Coils