Air ducts have an interesting and long history, thanks to the Greeks and Chinese for this idea. It stretches back over centuries, which has given rise to modern air ducts. Earlier in the 4th century, chimneys and flues were invented, which kept the entire structure warm without eliminating the smoke from the fire. Around 300, a set of underground tubes were introduced by Romans. These tubes were connected to a wood furnace that circulated the warmth of the fire in the entire structure. Slowly, many things changed, and the air duct cleaning equipment was introduced and being used today.  

How the Unit Used to Work?  

By the renaissance, hot and steam water was being sent through pipes. This air provides warmth, following which the concept of modern-day radiator grew. Through the 1800s, these units were used to keep the buildings warm. If you stay in a cold climate, staying warm is the most necessary thing this unit used to offer. But keeping a cool temperature on warmer days is a cause of concern.  

Wet Reeds Used by Egyptians  

Egyptians hung wet reeds in the windows to keep structures cool. As the breeze blew over them, it would help calm down the high temperature in the room. Benjamin Franklin, in the 1750s, stated that freezing water could be done by evaporating alcohol. Another person, Micheal Faraday, revealed that ammonia, when liquefied and compressed, serves the same purpose.  

A New Device was Invented  

By 1902, a few air duct service providers were launched, which came up with the idea of coils. These coils are used to keep the temperature cool and eliminate humidity. Also, it avoids the paper from wrinkling, and four years later, in 1906, the atomized sprayer was introduced. A mist was sprayed by the water-filled air ducts, which helped bring the textile plants’ temperature down. Afterwards, they were dubbed into air conditioning.  

The Development of Freon  

Freon had developed by the 1930s and was used in air conditioners to eliminate humidity and heat from buildings through window units. After that, central air conditioning was developed following the Second World War. That’s why many of them cannot imagine a summer or winter without a Heating, Ventilation, and Air Conditioning unit.   

About an Air Duct  

In simple words, an air duct is an integral part of an HVAC unit used in the USA. Cool and warm air travels through the entire structure by an air duct. You can consider your HVAC systems like the arteries and veins and the heart of your body. Do you know what an air duct means? It means through which the cool air travels throughout the entire house. In that way, your place remains warmer during winters.  

Enjoy the Comforts 

The main purpose of air ducts is to keep the home environment cool irrespective of how warm the temperature is outside. Also, it keeps the inside air fresh and makes the environment free of allergen. It means you breathe dirt-free air, which will reduce health problems.  

Maintaining the Ducts  

Maintaining the air ducts is the most important thing to eliminate all debris and ducts. But probably, you might not know the process of cleaning the ducts to eliminate them. However, these units are hidden in the ceiling or tucked away behind the walls. It is defined as the case of out of sight, out of mind. In this instance, you have to call the professionals who will come and clean the unit. Also, the air duct cleaning equipment might be complicated to use. But if you hire professionals, they can clean the unit easily without any chaos.  

Different Types of Air Ducts  

Professional cleaners use different air ducts to keep the debris and dust away. Otherwise, they can affect the indoor air quality to a great extent.  

Galvanized Steel: 

The most common material used in making air ducts is galvanized steel. The outer surface has zinc which eliminates rust, and there is no need to apply any paint. These air ducts are wrapped or lined using fiberglass after installation.  

Phenolic and Polyurethane: 

These air ducts are pre-insulated, and in just one step, the installation is complete.  


It is used to create special-shaped or custom-sized air ducts which a home needs. This material is lightweight and takes a little time to install.  

Several advantages are there which people can explore by using air ducts made using fiberglass. They have thermal insulation and have the capacity to absorb sound. It indicates that you won’t be hearing the sound produced when the HVAC system operates. The flexible air duct comprises plastic wrapped over the coils in a tube. 

The Cleaning of Air Duct  

A suitable way to keep the air ducts clean is by eliminating the dirt and water from entering the HVAC unit. Make sure that it is well insulated, which will eliminate all debris. The dirt should not come in contact with the mechanical portions. Understanding when to clean the air duct is a challenge as the Environment Protection Agency has set no specifications. It does not indicate how often the air ducts need to be cleaned. That’s why people do not check the unit most of the time, and the debris stays inside them. However, the EPA recommends an annual inspection to avoid huge expenses.  

Go For a Professional Help  

In order to maintain the air ducts and keep the specks of dust going for a long time, you should speak to professional help. They will come and inspect your unit to find out if there is a need to clean. They will also check all other parts to ensure that the unit is functioning properly. For breathing fresh air, ducts need to be cleaned regularly. It will eliminate all dust and debris from the unit. Well, while hiring professionals, you should go with experienced ones.