HVAC - Heating and Cooling

SKU: C-526Duration: 28 Minutes

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Great for trainers or groups who need unlimited online access to multiple courses. Available in two ways:

Heating and Cooling Systems Series (Details)
Includes 11 courses for $399/year.

Industrial Maintenance Library (Details)
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Course Details


Training Time: 28 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English, Portuguese

HVAC systems are used to maintain clean, conditioned air in enclosed spaces. The term "conditioned" refers to the fact that the temperature and humidity of the air are maintained within desired ranges. This module describes the two most common cooling systems as well as heating devices used in HVAC systems.

Learning Objectives

At the end of this module, you will be able to:

  • Identify and describe the three common types of heating systems - all-air, air-water, and steam
  • Describe the two most common cooling systems - direct expansion and chilled water - used in HVAC systems
  • Identify and describe the four steps of the refrigeration cycle
  • Describe why some types of refrigerants are being phased out
  • Describe heating devices used in HVAC systems, including heat exchanger coils, electric coils, gas heaters and infrared heaters
  • Identify the equipment that can be used to raise or lower humidity
  • Identify the functions of HVAC control systems

Key Questions

The following key questions are answered in this module:

What is the purpose of a heating, ventilation, and air conditioning (HVAC) system?
The purpose is to provide environments that are comfortable for people and allow temperature- or humidity- sensitive equipment to operate safely and reliably.

Where are HVAC systems typically used?
HVAC systems are used in residential, commercial and industrial facilities.

What type of heating systems are used in industrial facilities?
Heating systems used in industrial and commercial HVAC systems can be all-air, air-water, or steam, or a combination.

What type of cooling systems are used in industrial facilities?
There are two types of cooling systems used in commercial and industrial HVAC applications: DX or direct expansion systems, and chilled water or chiller systems.

How is humidity controlled in an HVAC system?
In an HVAC system, humidity can be controlled by either adding or removing moisture from the air. Humidifiers add moisture, while dehumidifiers remove moisture.

Sample Video Transcript

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

HVAC systems are used to maintain clean conditioned air in enclosed spaces. The term conditioned refers to the fact that the temperature and humidity of the air are maintained within desired ranges. Temperature control is accomplished by heating and cooling systems. HVAC heating systems can be all air, air water, or steam. HVAC cooling systems can be direct expansion systems or chiller systems. Heat exchanger coils are the primary device used by both heating and cooling systems. Electric coils, gas heaters and infrared heaters can also be used in heating applications. Humidity control can be accomplished using humidifiers or dehumidifiers. HVAC system controls regulate air flows, temperatures, and humidities, and also provide for the safe and efficient operation of the HVAC equipment.

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