Air Handling Systems

Air Handling Systems (AHS) are an essential part of any modern building, as they provide conditioned air to the occupants. AHSs are designed to maintain a comfortable indoor environment by controlling the temperature, humidity, and air quality. They are also used to remove pollutants and contaminants from the air, such as dust, smoke, and odors.

Types of Air Handling Systems

There are several types of AHSs, each with its own unique advantages and disadvantages. The most common types of AHSs are:

• Constant Air Volume (CAV) systems maintain a constant airflow rate, regardless of the load on the system. CAV systems are simple to design and operate, but they can be inefficient because they do not respond to changes in the load. However, new technologies like Variable Frequency Drive (VFD) can make CAV systems more efficient.
• Variable Air Volume (VAV) systems adjust the airflow rate to match the load on the system. VAV systems are more efficient than CAV systems, but they can be more complex to design and operate. VAV systems use various devices, including VAV boxes and controllers, to adjust the airflow rate.
• Dual Duct systems have two supply ducts, one for hot air and one for cold air. The air is mixed at the terminal units to provide the desired temperature and humidity. Dual Duct systems are more efficient than CAV systems, but they can be more complex to design and operate.
• Underfloor Air Distribution (UFAD) systems distribute the air through the underfloor plenum and then up through the floor. This system is efficient and provides good air quality but can be more complex and expensive to install.
• Displacement Ventilation systems use a low velocity, low-temperature air stream to ventilate the space. This system is very efficient and provides good indoor air quality but can be more complex to design and operate.

Components of an Air Handling System

The main components of an AHS are:

• Air handling unit (AHU) is the central component of an AHS. It houses the fan and other components that condition the air.
• Ductwork distributes the conditioned air to the different areas of the building.
• Terminal units control the airflow and temperature in each area of the building.
• Controls monitor and regulate the operation of the AHS.

Benefits of Air Handling Systems

AHSs provide several benefits for buildings and their occupants, including:

• Improved comfort
• Increased productivity
• Reduced absenteeism
• Improved health and well-being
• Increased energy efficiency
• Reduced operating costs

Careers in Air Handling Systems

There are many different careers available in the field of air handling systems. Some of the most common careers include:

• HVAC Technician
• HVAC Engineer
• Building Automation Technician
• Energy Manager
• Indoor Air Quality Specialist

Online Courses in Air Handling Systems

There are several online courses available that can help you learn about air handling systems. These courses cover a variety of topics, including the basics of air handling, the different types of AHSs, and the design and operation of AHSs. Some of the most popular online courses include:

• HVAC Psychrometry, Air Handling System and Duct Selection
• HVAC Fundamentals and BMS Controls

Conclusion

Air Handling Systems are an essential part of any modern building. They provide conditioned air to the occupants and help to maintain a comfortable indoor environment. There are several different types of AHSs, each with its own unique advantages and disadvantages. The most common types of AHSs are CAV, VAV, and dual duct systems.

Online courses can be a great way to learn about air handling systems. These courses cover a variety of topics, including the basics of air handling, the different types of AHSs, and the design and operation of AHSs. Online courses can be a helpful learning tool for anyone who wants to learn more about this topic.