January 20, 2023
Furnace in Kennesaw, GA

Heating, ventilation, and air conditioning (HVAC) systems are essential for providing comfortable temperatures in any home or office building. But what exactly is an HVAC system, and how does it work? Read on to learn the basics of an HVAC system and how it can keep your family, friends, or colleagues comfortable throughout the year.

What is an HVAC System?

An HVAC system is a combination of components and machinery that work together to heat and cool your home or office space. The most common type of HVAC system consists of a furnace or air handler, an air conditioner, ductwork, thermostats, and refrigerant lines.

How Does an HVAC System Work?

When set to “heat” mode, cool air from outside is drawn into the furnace/heat pump via a blower motor where it is heated before being distributed throughout your home or commercial space with the help of a fan in the air handler unit. Conversely, when set to “cool” mode cool air from inside is sent through evaporator coils where it absorbs heat before being sent outdoors while warmer air is circulated indoors via vents in each room. This process continues until desired temperatures are reached. It will then shut off automatically until the house cools or heats enough to require adjustment or until you change the temperatures.

Components of An HVAC System

An HVAC system is composed of various components that work together to keep a building comfortable and at the right temperature. The most basic parts include the air handler, which includes the blower and filter. There are also evaporator coils, condenser coils, and ductwork.

Air Handler

The air handler is responsible for drawing in outside air, heating or cooling it as needed, and then blowing it back into the building’s living spaces. It houses an electric motor with a fan blade that draws in outside air from an intake port, blows it over refrigerant-filled evaporator coils to cool it down or electric resistance heaters to heat up the air, then pushes it through a filter before blowing it out of an exhaust port into living spaces.

Evaporator Coils

Evaporator coils contain refrigerant which absorbs heat from surrounding air as it passes over them. The refrigerant absorbs some of this heat and then evaporates into gas form, which is pushed through a compressor to increase its pressure before passing through condenser coils which release this energy back out into the environment.

Condenser Coils

Condenser coils are located outdoors where they release their energy into the atmosphere and help lower temperatures in living spaces. In order for this process to work effectively, these coils must be clean so that their surfaces can properly transfer heat energy between outside and inside single temperature levels. If these surfaces become too dirty or clogged, they will not transfer enough energy efficiently resulting in less consistent temperatures within buildings.


Finally, ductwork is responsible for connecting all of these components together so they can all function properly while also allowing heated or cooled air to travel throughout different areas of buildings with ease. The effectiveness of any HVAC system depends largely on how well-designed the ductwork is since poor design can reduce efficiency by up to 40%. As such, proper sizing and insulation should be taken into consideration when designing ductwork for optimal performance and efficiency.

Maintenance Tips for Your System

Regularly keeping up with required maintenance services is key to prolonging the life of your HVAC system. Depending on where you reside, it’s recommended that an annual tune-up be done by a qualified technician to ensure your equipment runs at peak efficiency. Additionally, checking and changing out furnace and air-conditioner filters once a month can help prevent problems from arising due to dust or debris buildup.

Finally, it is important to have a professional perform regular routine inspections on various components such as evaporator coils, condenser coils and blower fans as this will help diagnose any possible issues before they become significant. Taking the time to properly maintain your HVAC system allows you to enjoy consistent temperatures while avoiding costly breakdowns and repairs.

Call Professionals Today!

At Controlled Climate Services, we understand that the comfort and safety of your home should not be taken for granted. That’s why we offer a complete range of cooling, heating, and indoor air quality services designed to give you peace of mind. Our experienced professionals will quickly diagnose any issues you may be facing with your home’s climate system and provide reliable solutions so that you can maintain optimum comfort all year round. Even better, our 24/7 emergency services are standing by whenever you face an issue late at night or in the middle of the weekend. Call Controlled Climate Services today to schedule a consultation.

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