The air source heat pump market is facing its biggest transformation in decades. Tightening EU legislation and environmental awareness are driving the industry towards cleaner solutions. Hesatek is now proud to bring you technology that not only meets future requirements, but clearly exceeds them: discover the Mitsubishi Electric RZ air source heat pump using the natural refrigerant R290.
When we talk about the environmental impact of heating appliances, attention is often focused on electricity consumption. However, the refrigerant circulating inside the appliance is at least as significant a factor. Synthetic refrigerants, which have dominated the industry for years, are being phased out, and a formidable challenger has stepped in: propane (R290).
The collapse of the GWP value – what does it mean for you?
The environmental impact of refrigerants is measured by their GWP ( Global Warming Potential ). The lower the number, the more environmentally friendly the substance is.
As the accompanying graph shows, the development has been dramatic:
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In 2004: The GWP value of the common refrigerant R404A was a whopping 3922 .
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2005–2017: Switched to R410A, which still had a high GWP of 2088 .
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Starting in 2018: R32, which entered the market, dropped in value to 675 .
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NOW (2025–): The new R290 refrigerant will reduce the number to just 0.02 .
In practice, this means that the new R290 refrigerant has almost no climate impact compared to old solutions. It is a natural, non-toxic and highly energy-efficient alternative that does not deplete the ozone layer.
Mitsubishi Electric RZ – The first of its kind
At Hesatek, we have been following developments closely. We only want to offer our customers devices that will last over time and use. That's why we are excited about the new Mitsubishi Electric RZ air source heat pump .
It is one of the first models from a major manufacturer to be designed from the ground up to take advantage of the properties of R290 refrigerant.
Why choose Mitsubishi Electric RZ?
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Future-proof: The EU is severely restricting the use of high GWP refrigerants. By choosing R290, you ensure that your pump is compliant throughout its entire life cycle.
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Top-notch energy efficiency: Propane (R290) is a refrigerant with excellent thermodynamic properties. It transfers heat efficiently, which is directly reflected in lower electricity bills.
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Reliability in the North: Mitsubishi Electric is known for its equipment that is built to withstand frost. The RZ model is no exception – it reliably produces heat even in the Finnish winter.
"Tightening EU legislation is pushing air source heat pump refrigerants towards environmental friendliness, and R290 is the answer to this cry."
Is it worth replacing the old pump now?
Many Finnish homes still have 10–15 year old appliances that use outdated refrigerants (e.g. R410A or R407C). Even if the appliance still works, its energy efficiency is far from today's standards.
By switching to the new R290 technology, you are making an eco-friendly but also economically sound decision. The new device will pay for itself in terms of better efficiency and lower heating costs. In addition, the availability of old refrigerants in maintenance situations is constantly decreasing and becoming more expensive.
Hesatek – Your expert in transformation
At Hesatek, we understand that technological advancements can seem complicated. That's why we're here to help you choose the right solution for your home or property that saves energy and the environment.
We are proud to offer the Mitsubishi Electric RZ model to our customers – it represents exactly the quality and responsibility that Hesatek stands for.
Do you want to be a pioneer and secure the future of your home heating?
👉 Discover the Mitsubishi Electric RZ model and request a quote here
