Air Handling Units

Introduction to Air Handling Units

How it works? 

An air handling unit is a device that circulates and filters air within a building. The unit typically consists of a fan, heating or cooling coils, a filter compartment, dampers, and controls. The AHU pulls in outside air through an intake vent or duct, filters the air to remove pollutants, heats or cools the air as needed, and then distributes the conditioned air to various rooms or areas of the building via ductwork.

Who first invented this unit? 

The modern air handling unit was first developed in the early 20th century, but no specific inventor can be credited with its creation.

Major producers and brands for this unit? 

Some major producers and brands of air handling units include Trane, Carrier, York, Daikin, Mitsubishi Electric, Fujitsu, LG, and Johnson Controls.

Major preventive and corrective maintenance activities done on this unit 

Some major preventive and corrective maintenance activities for air handling units include cleaning or replacing air filters, cleaning the evaporator and condenser coils, checking refrigerant levels (if applicable), inspecting electrical connections and controls, lubricating moving parts, and monitoring and adjusting airflow and temperature controls.


 The cost of an air handling unit can vary widely depending on factors such as brand, capacity, and features. Typically, prices range from several thousand dollars for a basic model to tens of thousands of dollars for larger, more complex systems.

Capacities range 

Air handling units come in a variety of capacities, typically measured in cubic feet per minute (CFM). Capacities can range from less than 500 CFM for smaller residential units to over 100,000 CFM for large commercial or industrial units.

Advantages and disadvantages 

Advantages of air handling units include their ability to provide centralized and precise temperature and humidity control, as well as their ability to filter indoor air to remove pollutants. Disadvantages include their higher upfront cost compared to some other systems, the need for professional installation and maintenance, and the potential for duct leaks or inefficiencies.

Where it is used mostly? 

Air handling units are commonly used in large commercial and industrial buildings, such as hospitals, schools, shopping centers, and manufacturing plants, where precise temperature and humidity control and indoor air quality are critical. They can also be used in residential settings, particularly in larger homes or apartments with more complex HVAC needs. Air handling units can be a good option for retrofitting into existing buildings or spaces where ductwork installation may be difficult or impossible.

in MEP
Air Handling Units
Administrator January 28, 2024
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