HVAC - Air Side: Introduction to Air Handlers

SKU: RVI-11459Duration: 20 Minutes

Did you know some air handlers have an airside economizer mode that will delay or eliminate the need for mechanical cooling if the outside air is cooler? The components, in an HVAC system, ensure that the air in this space is clean and odor free, and that its temperature, humidity and circulation rate are maintained within desired ranges. This interactive online course cover the components of an air handler, the operational functionality of an air handler, the methods of air handler maintenance, and the benefits and operation of an outside air economizer.

Course Details


Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

  • Identify the components of an air handler
  • Describe the operational functionality of an air handler
  • Describe the methods of air handler maintenance
  • List the benefits and operation of an outside air economizer

Key Questions

The following key questions are answered in this module:

What is the purpose of HVAC systems?
The purpose of HVAC systems is to provide environments that are comfortable for people and that allow equipment to operate safely and reliably.

What is an Air Handler Unit (AHU)?
The conditioning equipment and motive equipment (fans) in most systems are located together in a single large enclosure called an Air handler unit (AHU).

Where should air handling units be installed?
Air handling units are typically installed outside of the space that is to be conditioned, such as on a roof or in utility space.

How do dirty coils affect air flow?
Dirty cooling and heating coils will have less efficient thermal energy transfer and will reduce airflow.

What is the component responsible for moving air through the HVAC system?
The component responsible for actually moving air through an HVAC system is a fan.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

As the outside air temperature drops, the need for building cooling also drops, and at some point, there is no thermal gain from drawing in cool outside air. The outside air damper is typically locked out at an outside temperature of 55 degrees F. Some outside air is always brought into the system. In some climates, a preheat coil is installed upstream of all other coils. Its purpose is to make sure that the air passing through it is not so cold that it would damage or freeze any downstream coils.
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