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Understanding Your HVAC System: A Guide

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Do you know what makes up your HVAC system? Find out in today’s guide.

No matter what type of house you have, you’re going to need a heating and cooling system behind it. This will help you regulate the temperature to your desired setting and help you remain comfortable.

Even if you aren’t a DIYer, there are heating and cooling services in Chicago that can assist you. And throughout this guide, we’ll show you the most important parts of your HVAC system, so you know how to utilize it to your advantage.

Are you ready?

How Does Your HVAC System Work

The three main functions of your HVAC system is interrelated, even when delivering thermal comfort. Your air conditioning and heating system is one of the most extensive and complicated systems in your house and provide good air quality.

Here are the nine parts of your HVAC system you need to remember: filter, air return, exhaust outlets, electrical elements, ducts, blower, coils, outdoor unit, and compressor.

Electrical Element

The electrical element can be a tricky part to your system you think when somebody mentions an HVAC system. Pro Tip: If something isn’t working correctly, check if there are dead batteries or a tripped beaker in your thermostat.


As a certain part of the outdoor unit, your compressor is responsible for converting the refrigerant from a gas to a liquid. Pro Tip: If there is a problem with your a/c check the compressor. It’s the cost of multiple system failures.


The blower draws in the warm air in the unit. Pro Tip: The more efficient the air moves through, the more efficient the system will be.


The filter is the part of the air where the air is drawn through. Pro Tip: Change your filters often to make sure your system in complete shape.

Single or Multi-Stage?

Single stage cooling and heating are popular for colder climates and in hot systems. Respectfully because the systems are made to give comfort during the warmest or coldest days of the year. But most of the time, the air conditioners or heating system are operating at full capacity when they don’t have to.

That’s when a Multi-Stage cooling system is needed and can save you money and energy. Users can get a single-stage system that has a variable speed control to make a variable air flow. While the variation is slightly limited, you won’t experience that much of a difference.

Heating Systems

According to the U.S. Department of Energy, heating systems receive efficiencies up to 97%. This converts nearly all of the fuel into useful heat for the house.

Heating systems can be furnaces that deliver air through ductworks. Furnaces usually use propane or natural gas for fuel, while the boilers can use oil or gas.


Mainly, your heating and cooling system needs to be properly maintained. To do this, you should look for heating and cooling services in chicago to gain insights on what system works best for your home.

Do you have any additional questions about heating and cooling?

Tell us in the comments below!

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