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What is an HVAC System and How Does it Work?

What is an HVAC System and how does it work? Transcript (Click here)

So maybe you're a first-time homebuyer, or someone who has little to no experience with the HVAC industry, what is an HVAC system and how does it work?
In this video we'll break down the components equipment and processes of HVAC systems and give you everything that you need to start the conversation to replacement of your current heating and cooling system.
Hi I'm Luke from Fire and Ice. Most homeowners know what HVAC stands for heating, ventilation, and air conditioning, but very few people understand everything that goes into a full HVAC system. 
In this video we will cover:

  • what is an HVAC system?
  • how does an HVAC system work? 
  • how does the system heat your home?
  • how does this system cool your home?
  • how does an HVAC system move the air in your home?

We hope by the end of this video you'll have a solid understanding of HVAC equipment and processes so that you have a well-informed conversation with an HVAC contractor.

What’s an HVAC system?

So let's jump in and see what an HVAC system is. An HVAC system is the equipment, technology, and processes that go into heating, cooling, and ventilating a commercial or residential property. 
In terms of heating most homes will have a furnace heating their home. Furnaces come in different types and can use different fuel sources like natural gas, electricity, propane, and etc. Heating equipment generally includes a blower motor as well, which moves the air throughout the home.
In terms of cooling an HVAC system will traditionally include an air conditioner or heat pump. An air conditioner only cools; where a heat pump can cool, but can also provide heat for a home. 

So how does the air actually move throughout your house? Ductwork.

A home's ductwork is designed to house the air that is conditioned by the air conditioner or heated by the furnace. There are situations where you only need to heat or cool one part of your home and ductless HVAC systems will not include many of the more advanced forms of ventilation.

How does an HVAC system work?

So how does an HVAC system work the important thing to know is that the HVAC equipment moves air. In general, a system exists to move warm air elsewhere either into the home or out of it. A home's air conditioner heat pump and furnace captures or creates the heat and then the blower and ductwork help to facilitate the movement. Simply put, an HVAC system is designed to heat or cool your living space the most efficiently and comfortable way possible.  

How does an HVAC system heat your home?

A furnace generates heat either through electrical energy or burning its fuel source. This fuel source is most typically natural gas, but can be propane or oil as well. Heat pump works somewhat differently when heating it absorbs heat from the outdoor unit and transfers it to the inside. It's not generating heat so much as actually transferring it from one place to another. 

How does an HVAC system cool your home?

So now let's talk about how an HVAC system cools your home. Instead of creating cold air, which is a common myth, air conditioners and heat pumps absorb heat from within a home and move it to the outdoor unit where it is vented outside.  The refrigerant in a cooling system is key to this. The HVAC system changes the pressures of the refrigerant depending on where it is it is then able to absorb ambient heat and remove it once it's at a different pressure.

How does an HVAC system move the air in your home?

Ductwork is the most obvious here, as it is directly connected to your heating
and cooling system. Depending on the equipment ventilation may need to be changed so that it goes out the side of the home instead of through the roof. 

So what should you do next?

if you want more information on what an HVAC system is click the link in the description below. If you found this video helpful feel free to hit subscribe and click the bell icon to get notifications every time we upload a new video. Thank you for watching and we look forward to making your day even better.

Video source: Fire & Ice Heating and Air Conditioning Inc. (2020, September 8). What is an HVAC System and how does it work? [Video]. YouTube.

What is an HVAC System?  

HVAC stands for Heating, Ventilation, and Air Conditioning. An HVAC system is a system that handles these three things in homes or business building. They are responsible for transferring heat and air around homes. They keep you warm in winter, cool in summer, and move air in and out of your building. These systems can also be responsible for purifying the air in your home and preventing humidity build-ups.  

HVAC systems are traditionally made up of a combination of devices working in tandem to keep homes comfortable. This will often air conditioning units, dehumidifiers, central heating, and air filtration systems. 

The two types of basic HVAC systems are heating and cooling.

 Heating system options include: 

  1. Furnaces 
  2. Boilers 
  3. Underfloor heating 

Cooling system options include:

  1. Central air conditioners
  2. Ductless min-split systems
  3. Heat pumps
  4. Evaporative air conditioners

For more information about the basics of an HVAC system, review What is an HVAC System? Beginner’s Guide by Bob Wells. Also, check out some interesting videos on many aspects of HVAC from the Air Conditioning/Heating/Refrigeration News.


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