Constant Air Volume - CAV HVAC System

The video tutorial explains the Constant Air Volume (CAV) system, a type of HVAC system used in buildings. It covers the basic components and operation of CAV systems, highlighting their simplicity and cost-effectiveness. However, it also discusses the limitations of CAV systems, such as inefficiencies in temperature control and energy consumption. The video explores potential modifications and advanced configurations, like dual duct systems, to improve efficiency. It concludes with recommendations for optimizing CAV systems, including the use of temperature reset controls.

What is one reason why CAV systems are becoming less common in new buildings?

• They are more complex to operate.

• They consume more energy compared to VAV systems.

• They offer superior zone control.

• They are more expensive to install.

In a CAV system, what remains constant while the air temperature varies?

• Air quality

• Air pressure

• Air volume

• Air humidity

What is a major limitation of CAV systems regarding temperature control?

• They cannot adjust air volume.

• They supply the same temperature air to all rooms.

• They provide different temperatures to each room.

• They can only heat air, not cool it.

How can energy savings be achieved in a CAV system?

• By reducing air temperature

• By installing larger AHUs

• By using variable speed drives

• By increasing air volume

What is the purpose of terminal reheaters in a CAV system?

• To cool the air further

• To reheat the air to a higher temperature

• To filter the air

• To increase air volume

What is a drawback of using dual duct CAV systems?

• They are highly energy efficient.

• They provide poor thermal control.

• They have little control over humidity.

• They are easy to install.

What does a temperature reset control do in a CAV system?

• Increases the air volume

• Improves air quality

• Monitors and adjusts air temperature

• Decreases the air pressure