HVAC - Air Side: Air Distribution

SKU: RVI-11456Duration: 20 Minutes

Do you know the meaning of the term "building static"? How about "flow balancing"? 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. An HVAC system is a group of components working together to "condition" the air in an enclosed space. This interactive online course focuses primarily on the components that move, distribute, and control the flow of air through HVAC systems.

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As the fan rotates, centrifugal force throws the air from between the blades outward, creating both a pressure and a flow of air.

The term "building static" refers to the pressure inside of a building, as compared to that outside a building.

A constant volume of air is delivered to conditioned spaces, and a thermostat measures the resulting temperature.

Course Details

Specs

Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

Identify duct and building static pressure issues, fans, and drives
Describe the operation of actuators and dampers
Describe why HVAC zoning is needed and how it is accomplished
Describe the operation of ducted vs. return-plenum distribution systems

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 are the components that make up an air handling unit (AHU)?
An air handling unit is made up of a fan, filters, and heat exchangers.

What is "building static"?
Building static is the air pressure inside of a building as compared to that outside the building.

How is a HVAC zone established?
HVAC zones are established by grouping relatively small numbers of spaces together that have similar thermal requirements.

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:

Dampers determine the volume and direction of flow through supply ducting. A damper is an air “valve,” a structure within a duct that can be moved to hinder or even stop the flow of air in a duct. Damper design is related to the type and size of the duct. Typical designs include: • Butterfly dampers – a single plate that rotates around a central shaft to align the plate either parallel to the flow (open) or perpendicular to the flow (closed). These are most common in round ducts. • Shutter dampers – a set of parallel louvers mechanically connected that can be simultaneously operated by a single shaft to be parallel to the flow (open) or perpendicular to the flow (closed). These are most common in rectangular ducts.

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