HVAC - Air Side: Air Handling in Commercial Buildings

SKU: RVI-11457Duration: 20 Minutes

The purpose of Heating, Ventilation and Air Conditioning (HVAC) systems is to provide environments that are comfortable for people and that allow equipment to operate safely and reliably. HVAC systems are used in residential, commercial and industrial facilities. This interactive online course focuses primarily on the components which condition and move the air that flows through HVAC systems.

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A method for recovering heat is the use of a thermal wheel.

Coils can be cleaned with compressed air, or with water and cleaning solutions.

The pressure in the building is a sum of the effect of all the supply, relief, and exhaust fans pushing air into and pulling air out of the structure.

Course Details

Specs

Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

Recognize the primary components of an air handler
Describe how an air handler operates
List some methods of air handler maintenance
Identify some different types of air handling systems
List methods of air handler troubleshooting

Key Questions

The following key questions are answered in this module:

What is an HVAC system?
An HVAC system is a group of components working together to "condition" the air in an enclosed space.

What is a recuperator?
A recuperator is a gas/gas exchanger which has air leaving the building (exhaust air) on one side, and incoming fresh air on the other.

What are the methods for heat recovery in an air handling unit?
Methods for recovering heat in an air handling unit are thermal wheel and recuperator exchanger.

What is a Magnahelic?
A Magnahelic is a differential pressure gauge that is often permanently installed to measure the pressure drop across a filter bank.

What is "total pressure"?
Total pressure is the combination of static pressure and velocity pressure.

Sample Video Transcript

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

The construction of air handling units is somewhat dependent on their size. Typically, they are rectangular enclosures consisting of an internal skeleton of structural beams covered with sheet metal. All joints should be airtight. The walls of the enclosure should be insulated for energy savings and sound reduction. Air handling units are typically installed outside of the space that is to be conditioned, such as on a roof or in a utility space. This placement minimizes the impact of the sound of the operating equipment on the occupants of the conditioned space. Such an arrangement also allows ample access to the unit for maintenance purposes. AHUs which are installed on a rooftop may have additional protection from the weather. This may include, in northern climates, being mounted on an elevated pedestal to minimize interference from accumulated snow.

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