Understanding Different Types of Refrigerants in Aircon Units

Air conditioners keep our homes cool and comfy. They use a special liquid called refrigerant to move heat out of the air. This liquid is super important for an air conditioner to work right.

It’s like a superhero that fights off heat.

Some refrigerants are kinder to the planet than others. For a long time, we used one called R-22, also known as Freon, but it hurt the ozone layer up in the sky that protects us from too much sun.

Now, folks want to use safer stuff for the Earth like R-32 because it doesn’t harm the ozone as much.

Another one named R-410A doesn’t have chlorine which was bad for our upper sky shield but can still hit the environment hard. People are starting to talk about newer options such as R-454B which could be even better.

Companies like Anderson Air help check your air conditioner and make sure it has enough of this magic cooling juice without any leaks! Understanding these different liquids helps us take care of both our home comfort and our big blue planet.

Read on to learn how each type works its cooling magic!

Understanding Refrigerants in Air Conditioning Units

Understanding refrigerants is crucial to comprehending how air conditioning units function. These substances, pivotal in the heat absorption and release cycle, enable our aircon systems to provide a cooling effect by transitioning between various phase changes.

Definition of refrigerant

A refrigerant is a special substance used in air conditioning systems. It flows through an AC’s coils and changes from gas to liquid as it absorbs heat from the inside of a room. This process cools the air, making spaces comfortable on hot days.

The cooled refrigerant then travels outside, releases the absorbed heat into the atmosphere, and turns back into a gas.

This cycle keeps repeating so that your home stays cool. Refrigerants must work well under different temperatures and pressures without harming the environment too much. They play a key role in how effectively an air conditioner operates, affecting its energy efficiency and impact on things like global warming potential (GWP) and ozone layer protection (ODP).

How Aircon Gas Works

Understanding how aircon gas operates is key to appreciating the magic of cool air in our homes and offices. Refrigerant gas travels through a closed system of coils, absorbing heat from inside rooms.

The warm gas moves to the outside unit where it releases the heat and turns back into a liquid. This process keeps repeating, pulling more heat out each time.

The refrigerant changes from liquid to gas as it absorbs indoor heat over the evaporator coil. It then flows to the compressor, which increases pressure, making it hotter still. Next, it reaches the condenser coils outside where it loses its warmth to the outdoor air.

This switch between hot and cold helps maintain comfortable temperatures wherever ACs are used.

Main Types of Refrigerants Used in Aircons

Delving into the realm of air conditioning technology, we uncover a variety of refrigerants each with distinct properties and applications. These substances play a pivotal role in our quest for cooler indoor environments, shaping both the efficiency of aircon units and their environmental impact.

R-22 refrigerant

R-22 refrigerant, often called Freon, used to be common in air conditioners. It helped make homes cool by taking heat from the inside and moving it outside. But scientists found that R-22 harms the ozone layer.

This layer protects us from the sun’s harmful rays.

Countries around the world agreed to stop using R-22 because of its dangers. The Clean Air Act of 2010 also made rules to phase out this substance in HVAC systems. Now, HVAC professionals use other gases that do not damage the ozone as much.

These new gases are better for our planet too.

R-32 refrigerant

Moving from the older R-22 refrigerant, we now see a shift towards R-32 in modern aircon units. This new refrigerant stands out for being more environmentally friendly and energy-efficient.

It lowers the risk of harming the ozone layer and reduces greenhouse gas effects compared to its predecessors. Many choose R-32 for their cooling systems because it’s safer and performs better.

Manufacturers prefer R-32 because it meets strict EPA regulations while supporting high-quality air conditioning performance. Aircon units using this type of gas not only comply with safety regulations but also contribute to better air quality indoors.

Its low potential to deplete the ozone layer makes R-32 an important part of eco-friendly commercial refrigeration solutions. As part of ongoing industry evolution, this coolant is becoming the standard choice in HVAC equipment, reflecting our growing commitment to environmental responsibility.

R-410A refrigerant

Switching from R-32, another progress in aircon technology is the R-410A refrigerant. Often known as Puron, it’s a cooling agent widely used in many modern air-conditioning systems.

Unlike its predecessor R-22 Freon, R-410A doesn’t have chlorine atoms which were harmful to the ozone layer. This makes it less of an environmental risk when considering ozone depletion.

R-410A works efficiently in residential and commercial air conditioners and heat pumps. It absorbs and releases more heat than older refrigerants, making your aircon unit work smoothly with less energy.

However, because it operates at higher pressures than other refrigerants such as R-22, systems must be specifically designed for use with Puron to handle this increase safely. Despite being better for the ozone layer, it’s still not perfect.

Like all hydro-fluorocarbons (HFCs), R-410A contributes to greenhouse gas emissions if released into the atmosphere.

R-744 refrigerant

Moving on from synthetic refrigerants, R-744 stands out for its environmental benefits. It is also known as CO2 or carbon dioxide in everyday terms. This natural substance shows great promise due to its very low impact on the environment.

Unlike many other coolants, it doesn’t harm the ozone layer and has a negligible greenhouse effect.

R-744 operates at higher pressures than traditional refrigerants, which calls for stronger and more robust aircon components. It’s heavy too and in case of leaks, it could replace oxygen in a room.

That means technicians need to handle it with care. Despite these challenges, R-744 finds its place in large industrial cooling systems where its eco-friendly nature is highly valued.


Refrigerants play a key role in cooling our homes and workplaces. They capture heat and move it elsewhere, making aircon units effective. Newer types aim to reduce harm to the environment.

Each refrigerant has unique qualities suited for different systems. Choosing the right one helps us stay cool while protecting our planet.


1. What are refrigerants used for in aircon units?

Refrigerants in aircon units capture heat from the inside of a building and release it outside, helping to cool your space efficiently.

2. Why is R-22 refrigerant being phased out?

R-22, also known as Freon, is being phased out because it has high ozone depletion potential, which harms the earth’s protective layer and contributes to climate change.

3. What refrigerant replaces R-22 in new air conditioning systems?

Newer air conditioning systems use R-410A (Puron), a more environmentally friendly option with no ozone depletion potential compared to its predecessor, R-22.

4. What was the purpose of the Montreal Protocol regarding AC refrigerants?

The Montreal Protocol aims to cut down on substances like HCFCs that cause ozone depletion; this international agreement encourages phasing out chemicals harmful to the atmosphere.

5. Can I simply switch from using R-22 to newer types of refrigerants in my existing Aircon unit?

It’s not straightforward; replacing R-22 with another type without proper adjustments can harm your system. Always consult HVAC professionals before making any changes.

Leave a Comment

Your email address will not be published. Required fields are marked *