An HVAC system with the cover removed showing the internal wires

What is an HVAC System Anyway?

You may know that the HVAC system is an important part of the home. Knowing exactly what this system entails or does in its entirety is not always so clear. If you are a homeowner who wants to know more about your Heating, Ventilation, and Air Conditioning (HVAC) system, you’re in luck. The team at MLD HVAC is happy to explain any part of your home’s mechanicals in detail, so you can be a more informed and proactive homeowner when it comes to maintenance or repairs.

To get you started with the basics of the system, we’ve also put together this little guide to the standard home HVAC system.

The Anatomy of an HVAC System

The typical home usually has a gas or electric furnace and an electric air conditioner which are hooked up to maze of metal ductwork located in the walls and floors. You may have noticed that the furnace is located inside the home, usually a basement or utility room, while the ac condenser unit is outside. Both the furnace and the AC work together to help keep your home comfortable, despite their separate locations.

The Furnace

It serves as the base of your HVAC system. Whether you are heating or cooling, air almost always travels through the furnace to be cleaned via the air filter and blown back through the household ventilation system.

The base of the furnace is where air is pulled in from your home’s intake vents. Once it enters the furnace, the air is warmed by a heat exchanger. A blower fan inside the furnace pushes this warmed air up through the furnace and into the exit vents where it passes throughout the house.

The Air Conditioner

If you want to use the air conditioning, the process is very similar. Air is pulled into the furnace and pushed up to a set of AC evaporator coils that are usually placed near the middle or top of the furnace. These coils are off when the heating is switched on.

The coils are filled with liquid refrigerant that is colder than the indoor air. When the air passes over these coils it is cooled, and the liquid inside heats up causing it to become a gas. The cooler air is blown up to the exit vent at the top of the furnace and pushed out into the living areas. Evaporated refrigerant travels outside the home to the exterior condenser unit, where it is cooled with a heavy-duty fan until it condenses into a liquid again, ready to return to the evaporator coils and cool more air again.

Learn More About Your HVAC System Today

There are several other parts of the standard HVAC system to learn about, such as the thermostat that allows you to switch between heating or cooling. You may also be interested in learning about window AC units or installing a heat pump in your home. If you are thinking about furnace or air conditioner maintenance, repairs, or replacement in Austin, reach out to MLD HVAC today. We’ll be happy to set up an in-home consultation to explain more and discuss your options.

Call Now ButtonCall Now!