R290 vs R32: Which Refrigerant Is The Future Of Home Climate Control?

Most people don’t talk about refrigerants over dinner, but they are more important to UK homeowners than many think.

With more UK homes looking at air conditioning or heat pumps for heating and cooling, the type of refrigerant used becomes important. It influences the environment, how systems are built, safety rules, and how well the system will work in the long run.

Two important refrigerants in the UK home climate control conversation are R32 and R290.

R32 is now widely used in modern air conditioning systems. R290, which is also called propane, is getting noticed because it has a very low global warming potential. This makes it popular for heat pumps and some new types of cooling systems.

So, when it comes to R290 and R32, which one will shape the future of home climate control?

There isn’t a simple winner here. Each has its own advantages and needs to be used safely.

Still, both show the direction the industry is moving.

Before we go any further, let’s define what a refrigerant is.

Jargon Buster: Global Warming Potential (GWP)
A metric used to measure how much heat a greenhouse gas traps in the atmosphere over a specific period of time, relative to carbon dioxide. A lower GWP indicates a significantly smaller environmental impact.

What Is A Refrigerant?

A refrigerant is the fluid inside an air conditioning or heat pump system that moves heat from one place to another.

It is not just any fluid. Refrigerants are chosen because they can change from liquid to gas and back again under pressure. This lets the system absorb heat in one place and release it in another.

Inside the system, the refrigerant is compressed, cooled and expanded as it moves through the pipework. This cycle allows your air conditioner or heat pump to transfer heat efficiently.

In cooling mode, the refrigerant helps remove heat from inside your home and release it outside. In heating mode, a heat pump can reverse the process by taking heat from outside air and moving it indoors.

Without the right refrigerant, your system cannot move heat properly.

Older systems often used refrigerants with a higher environmental impact. The industry is now moving towards lower global warming potential options, also known as low-GWP refrigerants.

This is where R32 and R290 come in.

What Is R32?

R32 is a refrigerant found in many modern air conditioning systems.

It became popular because it has less impact on the climate than older refrigerants like R410A.

R32 also works well in many home air conditioners, making it a common choice for manufacturers and installers.

R32 is still an F-gas, so it is covered by UK rules for fluorinated greenhouse gases.

These rules set out how F-gases are used, handled, installed, checked, and recovered.

For homeowners, the main thing to know is that R32 is widely used, well understood by qualified installers, and suitable for many current home air conditioning systems.

What Is R290?

R290 is a type of propane made for use as a refrigerant.

It is a natural hydrocarbon refrigerant, which sets it apart from R32.

Hydrocarbon refrigerants are gases like propane or isobutane. They help heating and cooling systems move heat efficiently, but they are flammable and must be handled with care.

The main advantage of R290 is its very low GWP.

GWP, or Global Warming Potential, measures how much a gas can warm the atmosphere if it leaks out.

R32 has a GWP of 675, which is lower than older refrigerants like R410A, but much higher than R290’s GWP of about 3.

This makes R290 appealing to manufacturers who want to lower the environmental impact of heating and cooling systems.

R290 can also work well in heat pumps and other climate control systems if the equipment is designed for it. Some heat pump makers already use R290 because it offers good performance with less environmental impact.

However, R290 is classed as an A3 refrigerant, meaning it is not very toxic but is highly flammable.

This does not mean R290 systems are unsafe. It just means they need proper design, installation, and servicing. Homeowners should always use qualified professionals for any system with refrigerant.

R290 vs R32: The Main Difference

The main differences between R290 and R32 are their environmental impact, flammability, and how common they are in today’s home climate control systems.

To sum up:

• R32 is the established low-GWP option for many current systems.
• R290 is the ultra-low-GWP option gaining ground for the future.

Why Are Refrigerants Changing?

Refrigerants are changing because governments, manufacturers, and installers are working to lower the climate impact of heating and cooling systems.

In the UK, F-gas rules apply to equipment such as air conditioning and refrigeration systems that contain fluorinated greenhouse gases. These rules affect how refrigerants are used, handled, recovered and phased down.

F-gas rules cover R32. R290 is not an F-gas, but it still needs careful handling because it is flammable.

As a result, the industry is moving away from high-GWP refrigerants and choosing options with less impact on the environment.

This is important because air conditioning and heat pumps are expected to become more common in UK homes.

Summers are getting hotter, more people are working from home, and homeowners want more efficient ways to heat and cool their homes.

The type of refrigerant used is part of this bigger change.

Is R290 Better Than R32?

If you only look at global warming potential, R290 is better than R32.

A GWP of about 3 is much lower than R32’s 675, giving R290 a clear environmental edge.

However, choosing a refrigerant is not just about GWP.

The system also needs to fit the property, be safe to install, easy to maintain, and meet the right standards. Availability and installer training are important too.

R32 is still more common in home split air conditioning systems. Many qualified installers know it well, so it is a good choice for homeowners who want efficient cooling right now.

R290 will likely become more important as manufacturers create more systems using natural refrigerants. It may be especially useful for heat pumps and future low-carbon home climate control.

An Engineer’s View

While R32 has been a reliable and established standard for modern systems, R290 represents the gold standard for future-proofing your home climate control. Its incredibly low GWP means you get excellent energy efficiency without a heavy environmental toll.

– Rhys Powell, Engineer

Is R32 Being Phased Out?

R32 is not going away anytime soon.

It has already helped the industry move away from higher-GWP refrigerants, and many systems still use it. However, the trend is clear.

Refrigerants with less impact on the climate are becoming more important.

This means R32 may be seen as a stepping-stone refrigerant.

It is cleaner than many older options, but it is not the final choice for every system.

As rules and product designs change, refrigerants like R290 will probably become more common.

Is R290 Safe for Homes?

R290 can be safe if it is used in equipment designed for it and installed correctly.

The key thing to remember is that R290 is not a standard low-flammability refrigerant. It is highly flammable, so systems need proper safety measures. Installers also need the right skills and training.

Professionals with the right F-gas qualifications must handle systems containing R32. Systems containing R290 also need trained professionals because the refrigerant is highly flammable.

That is why homeowners should never try to install, repair or change refrigerant systems themselves. No matter which refrigerant your system uses, whether R32, R290 or another option, it should always be installed and maintained by a qualified professional.

What Should UK Homeowners Actually Care About?

Most UK homeowners do not need to choose a refrigerant in isolation.

You do not need to stand in your kitchen comparing refrigerant tables like a tiny domestic climate scientist.

Instead, you need to choose the right system, from the right manufacturer, installed by the right professional.

When comparing air conditioning or heat pump options, ask practical questions:

• Is the system suitable for my home?
• Is it efficient?
• Is it quiet?
• Does it offer heating and cooling?
• Is the installer qualified?
• What refrigerant does it use?
• How future-ready is the system?

For many homes, an R32 air conditioning system may still be a sensible, efficient choice. For other systems, especially as more R290 products become available, R290 may offer a stronger long-term environmental profile.

WarmZilla Helps You Make the Right Choice

With WarmZilla, you do not need to make that decision on your own.

Our role is to help you find a home climate control system that suits your property, comfort needs, and budget. That includes looking at the type of system, the size of the space, the installation requirements and the technology inside the unit.

Your installer can also confirm which refrigerant is used in your system, whether that is R32, R290 or another suitable option.

The important thing to remember is that both R32 and R290 can be safe for home use when the system has been designed, installed and maintained correctly. The refrigerant itself is only one part of the picture.

Proper equipment, professional installation and correct handling all matter.

With WarmZilla, the goal is simple: help you choose a safe, efficient and future-ready climate control system without turning your home improvement project into a chemistry lesson.

Frequently Asked Questions

Is R290 Better Than R32?

R290 has a much lower global warming potential, so it has a stronger environmental profile. However, R32 is currently more common in many domestic air conditioning systems and remains a practical choice.

Is R290 Dangerous?

R290 is highly flammable, but it can be used safely in systems designed for it. The key is proper installation, correct system design and qualified handling.

Will R32 Be Banned?

R32 is not disappearing overnight. However, the industry is moving towards lower-GWP refrigerants, so R290 and other alternatives may become more common in future systems.