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What is an HVAC SYSTEM?
Everything you Need to Know About HVAC SYSTEMS

One of the best upgrades you can make for your home is installing an HVAC system. However, many people wonder about the different aspects and details of an HVAC system.


Even if your home already has HVAC, the chances are that you might not fully understand all the ins and outs of your air conditioning, ducts, and heating. Luckily, this article describes exactly what an HVAC system is and why they are essential for your home.


An HVAC system has several phases of installation. HVAC stands for heating, ventilation, and air conditioning, and all parts of the system work together to heat and cool your home. 

HVAC is available for even the smallest homes or rooms and can get scaled up to the largest commercial buildings. However, the process of installing and using the HVAC system is the same for all settings. Read on for more information about HVAC systems.

What is an HVAC System?

If you are wondering what is an HVAC system, the word is an acronym. HVAC stands for Heating Ventilation and Air Conditioning. It requires professional installation because of the complexity of the systems involved.


The HVAC system uses thermodynamic concepts, fluid mechanics, and principles of heat transfer to spread cooled or heated air throughout the building. Heat pumps, split systems, heat exchangers, and central heating and cooling are all parts of the HVAC system used to regulate indoor air quality and deliver air conditioning.

Many of the HVAC system installation core parts are the same whether you are installing personal residential or large-scale commercial systems. Temperature and humidity control is the goal of any HVAC system. Many of the components are aimed at regulating these components.

Overall, suppose you are looking for the best option for heating and cooling your home or business. In that case, an HVAC system delivers climate control from a central location.


Heating and air conditioning together make the HVAC system more energy-efficient but also more complicated.



The products necessary for heating and cooling in your home HVAC system are each important. Professional installation and maintenance are essential for proper use and safety.

All furnaces consist of four elements:

  • burners to convey and burn fuel

  • heat exchangers

  • blower

  • a flue acts as the exhaust for gas from combustion.

Control of Heating and Cooling Systems

The heart of the heating system is the thermostat that controls the temperatures of our home. The air temperature can also govern this. The most crucial component is a bimetallic element contracting or expanding whenever the room cools. It makes an electronic contact before making another call. The system activates when the second contact is bent which triggers the heating system to turn on. The default setting temperature is the temperature that you set manually and is considered a standard temperature.

Older thermostats have two exposed contacts. This will react to a temperature change when you turn off the furnace if that temperature reaches the designated position. However, newer installed HVAC systems are much more energy-efficient and require only one bimetallic element.

How Central Heating Works

In the hottest seasons, your heating system runs with your central-controlled cooling system.


Air coming up from the filter and fan floats through the heat exchanger where it is heated. You then have it blown through ductwork, where it distributes throughout your home.

Some heating and cooling systems can be customized using cooling and heating units suitable for your climate.


You will need professional help deciding what heating and cooling technology are proper for you.

How Central Cooling Works

Warm air in homes is sent through the evaporator coil, and heat energy is absorbed into the inside of the coil. Eventually, this air is 'cooled.'


The refrigerant is pumped back into a compressor where the cycle continues.

Moisture contributes to the constant humidity of the air. Your cooling system is usually mixed with your central heating system because they share the same ductwork to distribute conditioned air across your home.


Your heating ducts generally combine to circulate air throughout your home because of the ventilation ducts.


Separate systems have two parts: an indoor unit and an outdoor unit. Split systems provide the most common HVAC system in modern residential environments.

Variable or multi-stage systems provide more precise temperature control and run more efficiently than single-stage systems.

A hybrid double fuel system is a power unit combined with an electric fire and an electric gas generator. A hybrid system contains a combination of electrical electric pumps and gas furnaces.

The ENERGY STAR classification will help identify energy-efficient products that meet consumer standards. According to ENERGY STAR, an HSPF greater than 7 is an efficiency measurement that means your HVAC system is energy efficient. More significant numbers mean greater efficiency and fewer costs.

A boiler produces heat in which the fuel is heated and spread through the entire dwelling.

A heat pump is a practical choice if you live in a mild climate.

Ductless systems provide a perfect way of heating or cool a single room without the worry of adding additional ductwork.

Thermostats primarily can be classified into two types: traditional or connected controls.

Connected controls can integrate with other intelligent home systems and learn how to heat and cool your home efficiently.


Air Return

Your air return is the beginning component of your system's ventilation cycle. This return is pumped into air that passes through a filter and returns to the system's central systems.

Keep your return regularly clean, as this is why there is much debris built into the filter.

Exhaust Outlets

Another component of your system is the exhaust exits, where the heated exhaust is expelled from the air system. Check your chimney pipe or air source annually, and do not forget maintenance if needed.


Verify your coil of aluminum monthly. The coil cools the air as it is passed through with the help of the refrigerant. If they freeze, you should check the filter and/or refrigerant levels.

Electrical Elements

If something is not working in the correct order, check for a lost breaker or a depleted battery in your thermostat. Check your battery for an empty battery or electrical breaker.


As a component of an outdoor unit, a compressor converts refrigerant from solid to liquid. In turn, it causes several systems failures.

Tip: Check out a compressor for any problems or failures with the refrigerant.


Your filter is the second stage of the air returning, where the air enters in and out of the HVAC system.

 Make sure to change your filters consistently to keep your system in tip-top condition.

Outdoor Unit

The outdoor unit houses the fan, which provides airflow.

Tip: Keep your fan clear of debris and vegetation, as any resulting contamination can seriously damage your fans.


Your duct is the channel where heating and cooling air passes through. Give your duct a cleaning every 2 to 5 years for good health and air quality in your home.


The blower draws warmer air into the central part of the unit. The more efficient the movement of air, the more robust the system will be.

What Factors Affect the Cost of a New HVAC System?

Understanding what is an HVAC system also requires knowledge of the price points. Regions and climate factor into the cost when choosing the best system for your house and saving energy. Installation costs can vary by 10%, depending on your location.


Large homes need ducts room or several different systems to maintain a comfortable temperature. Ductwork is a crucial component in determining how comfortable a room is. In addition, proper seals on windows and on doors and the insulation of your home can negatively contribute to heating or cooling expenses.


You have options to improve the general air quality by purchasing a Trane CleanEffectsTM air aerator or adding climate zones by opting for a ComfortLinkTM III system or even use the latest smart controls.

The Success of Indoor Air Technologies


Air conditioning and installation of HVAC systems shouldn't be trusted with just any company. The HVAC system's components and indoor air quality are vital parts of your life that need qualified technicians who have a strong track record of success and quality. You shouldn't have to wonder about whether your air conditioner or heat pumps will work properly.

Trust the friendly HVAC installers and technicians at Indoor Air Technologies for peace of mind and quality that you can feel. Our customers come first, and we won't stop any installation, repair, maintenance until you are 100% satisfied with the results.

Indoor Air Technologies takes care of its customers with:

  • Over 15 years of experience with a variety of HVAC systems and components

  • NATE certified professional technicians

  • EPA Certified Mainstream Engineering

  • Quick quote response time

  • Many 5-Star reviews on YELP!

  • Honest and reliable inspection & repairs


Let the professionals at Indoor Air Technologies handle your HVAC system installation or repair and get the job done right the first time. Give us a call or leave us a message today for a quick and free quote for the service we can provide you!

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