What is HVAC System? – Full form & Meaning

What is HVAC System?

The full form of HVAC system is Heating, Ventilation, and Air Conditioning. HVAC systems generally control temperature, humidity, and quality of air in a building or any occupied space. The main goal of the HVAC system is to create and maintain a comfortable environment for the occupant within a building.

There are basically seven main processes required to achieve the full meaning of HVAC and they are listed and explained below:-

Heating:

It is the process of raising or maintaining the temperature of the space by the process of adding additional thermal energy (heat) to the conditioned space.

Cooling:

It is the process of lowering or maintaining the temperature of the space by the process of removing thermal energy (heat) from the conditioned space.

Humidifying

It is the process of lowering or maintaining the moisture content of the air by the process of adding water vapor ( moisture) to the air in the conditioned space.

Dehumidifying

It is the process of lowering or maintaining the moisture content of the air by the process of removing water vapor ( moisture) from the air in the conditioned space.

Cleaning

It is the process of improving or maintaining the air quality by removing particulates and biological contaminants from the air delivered to the conditioned space.

Ventilation

It is the process of improving or maintaining the air quality, composition and freshness by exchanging air between the outdoors and the conditioned space for the purpose of dilution of the gaseous contaminants present in the air.

Air Movement

It is the process of circulation and mixing of the air through the conditioned spaces in the building for the purpose of achieving proper thermal energy transfer.

What is the Full form of HVAC?

In the word HVAC  “H” stands for Heating, “V” stands for Ventilation and “AC” stands for Air Conditioning.

H = Heating (Increase or decrease the temperature of water or air)

V = Ventilation (Supply right amount of clean and fresh air)

AC = Air Conditioning

As mentioned above, the term “HVAC” when properly used means the total control of temperature, moisture in the air (humidity), the supply of fresh outside air for ventilation, filtration of airborne particles in the air, and the movement of the air in the occupied space.

Also Read: Fly Ash Brick and Normal Clay Brick Comparative Study

Basic HVAC Parts

Schematic diagram for Radiant based HVAC System

Objectives of HVAC System

The main objective of an HVAC system is to provide a comfortable environment for the humans living in that space, but there are many other objectives for using this system: creating a suitable environment for farm animals for their optimal health, creating a suitable environment for the patients in a hospital, maintaining a suitable temperature for cold food storage and many more such type of objectives.
Let us briefly explain some design situations and the type of performance requirements for HVAC systems:

Farm Animals: The design generally focuses on the health of both animals and workers. The spaces of farm animals are always ventilated. Cooling or heating may be provided depending on the climatic condition, controlled by a simple thermostat. The ventilation rate of the farm may be varied to:

  • Maintaining indoor air quality (removal of body odor and excrement fumes).
  • Maintaining inside design temperature by bringing in cool air and exhausting hot air.
  • Removing moisture by bringing in drier air and exhausting of moist air.

Hospital Operating Rooms: This is a very critical environment often served by using a dedicated air conditioning system. The design objective follows:

  • Heating of the space to avoid the patient from becoming too cold in cold weather.
  • Cooling of the space to avoid any discomfort to the members of the operating room from the extremely hot weather.
  • Cleaning the air incoming air using air filters to remove any airborne organism that could infect the patient.

Frozen food storage: The absolute temperature for long time food storage varies i.e., ice cream requires temperatures other than that of storing meat. Therefore the design challenge is to ensure that the temperature is accordingly maintained.

Last Words

I hope you got complete information about the HVAC System and its full form in this article.

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Happy Learning!!

One Response
  1. raza March 30, 2020 Reply

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