Title: Unit 1 Outline
Course: HET 230 - Spring 2015 > Section: HET 230 - Spring 2015

Unit 1 Outline

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Unit 1 Outline

Introduction:

Welcome to the first week of Air Movement and Ventilation.  So why is moving air efficiently so important?  Without air movement and ventilation, there are limiting factors to maintaining adequate indoor air quality and moisture control within a conditioned space.  Therefore, Air movement and ventilation provide the suitable means of air circulation for conditioning a space, in conjunction with ancillary heating, cooling, moisture control, and air-cleanliness components.

Air movement and ventilation is an important subject for a variety of disciplines within the HVAC industry.  It is especially important for those performing service, testing, adjustment and balance (TAB), energy audit, and indoor air quality (IAQ) work.  One can see, learning the basics of airflow measurement, is an important part of becoming a highly skilled technician, or knowledgeable sales professional.  The student, who can masters the basics, has the opportunity to become highly desirable for a number of roles throughout the industry.

After completing this week, you should have a solid understanding of the basics of airflow and measurement.  You will also learn, and reinforce, new vocabulary to help you gain a better understanding of these concepts.  In addition, you will be provided a PowerPoint a presentation, weekly study materials.  You will also participate in weekly discussions and complete all assignments and a content assessment quiz.  You should be able to, demonstrate and explain the basic components, vocabulary, tools, and measurements, forming solid foundation for the next week’s session, Calculating Duct Size and Air Quality and Velocity.

Learning Objectives:

Upon completion of this week’s assignments, the student should be able to:

- describe the importance of circulating and ventilating air within a space or building
- describe what the term “Conditioned Air” means
- describe factors of  how air flows; and the role friction and pressure difference as it applies
- list the main components in an HVAC system, and describe what each contributes to conditioning air
- explain how air moves through an Central Air Handling System; and the terms identifying airflow direction
- recognize the tools used in determining the proper measurements for airflow; and demonstrate how they are used
- describe and demonstrate how to determine airflow and pressure in duct system
- Explain the procedures of how to “Traverse” both square and round duct for taking airflow measurements
- state how to determine airflow at outlets
- demonstrate measurement calculations to determine airflow with the use of learned math equations

Review the vocabulary terms listed below and look up their definitions / descriptions before taking the Vocabulary Quiz.

Vocabulary

Airflow

Anemometer

Atmospheric Pressure (AP)

Back Pressure

Capture Hood

Central Air Handling System

Cubic Feet per Minute (CFM)

Duct System

Duct Traverse

Exhaust Air (EA)

Indoor Air Quality (IAQ)

Inches of Water Column

Magnehelic® Gauge

Manometer

Mixed Air (MA)

Outlet Velocity (OV)

Outside Air (OA)

Pitot-tube

Pressure Difference (DP)

Return Air (RA)

Supply Air (SA)

“U” Tube Gage

Velocity

Velometer

Ventilating

Water Column Gage