How Do HVAC Systems Work in Large Spaces?

HVAC systems are an basic part of any building, whether its residential, commercial, or industrial. The latest sustainability trends and optimization of building performance have promoted people to learn about commercial HVAC systems and how they work.
An HVAC system helps in controlling the temperature, managing humidity, and improving air quality for residents and machinery in any commercial space. In this blog post, well take a look at how HVAC systems work in large spaces.

elements of a Commercial HVAC System

Needless to say, a commercial system is used in larger buildings like businesses, restaurants, and enterprises. They are known to be much more strong and be make up of consistently many different parts that work together to provide a comfortable indoor ecosystem.

Lets take a look at a few main elements of a commercial HVAC system:


The thermostat controls the system by sending it a signal to generate cool or hot air based on the temperature setting.


This is the largest part of an system thats meant to provide the heat.

Heat Exchanger

This is located inside the furnace and its used to heat the air thats pulled in by the furnace.

Refrigerant Lines

The refrigerant lines help transform refrigerant substances into liquid form.

Ductwork and Vents

The ductwork and vents are needed to provide cooled or heated air into the commercial building.

How Do These Systems Work?

As weve established, a system is needed for three different processes such as heating, ventilation, and cooling. All of these processes require an individual unit that once combined together, makes up your system that is controlled by a central thermostat. Here are the system working principles you need to learn about to understand how they work:


If your HVAC system came with a furnace, the central thermostat will begin the heating course of action by sending a signal to the furnace. As a consequence, a gas valve inside the furnace will open and ignite the gas burning, generating heat that will be used to heat the heat exchanger. As the heat flows by the heat exchanger, it will be turned into air.
After that, it will be distributed by an internal motor and fan and transferred to the ductwork and vents that are located all over the commercial space.


An HVAC system is rendered useless if it doesnt have a proper ventilation system because ventilation allows a sufficient amount of fresh air to circulate throughout your commercial space without interrupting any of the cooling and heating processes.
Ventilation works by releasing unhealthy contaminants that are produced during the heating and cooling procedures by vent pipes and flues and letting new air go into the space in a controlled manner.

Air Conditioning

Air conditioners, however, use refrigeration to cool the air. Substances that are used to absorb the heat are called refrigerants and they start in a gas form. A compressor compresses the gas and raises the temperature.
When its pressurized properly, its sent into a condensation wire that releases the heat and transforms it into a cooler liquid. A blower is used to absorb the warm air and move it over an evaporator. This causes the liquid to become a cooler gas again that absorbs the heated air and cools it effectively.

Now that youve learned how HVAC systems work, youll be able to get the most out of them and fulfill your dream of having a comfortable and energy-efficient commercial building.

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