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The air conditioning industry has seen a lot of change in recent years and although it’s easy to ignore the idea of changes in legislation, it is something none of us can afford to ignore – particularly when considering the air conditioning technologies of the future. 

This is something that is going to start affecting everyone involved with air conditioning, whether they are a corporate end-user managing a network of buildings, a consultant specifying the equipment, or the engineer installing it.

The fact is we are now facing some truly major challenges on refrigerants in particular and energy use in general – and these are challenges that are simply not going to go away anytime soon.

Added to these changes, by April 2018, landlords will be legally barred from letting commercial buildings with an Energy Performance Certificate rating lower than E, under the Minimum Energy Efficiency Standards (MEES).

Legislation in all its forms and guises (both EU and UK government led) is here and it’s real. 

British Standard EN378 is going to start impacting on the type of systems that can be installed in places such as hotels and accommodation, without the addition of refrigerant leak detection.

Mark Grayston Product Manager for Mitsubishi Electric’s advanced range of VRF and Hybrid VRF air conditioning systems

However, rather than running scared of the impact of legislation, I believe that by fully embracing positive, forward-thinking, businesses can not only be ready for it, but actually lead it.

Energy performance will still be key

Modern Variable Refrigerant Flow (VRF) air conditioning is already proven to be highly energy efficient and a well-designed and fully optimised system can help improve both the comfort levels and energy labelling of a building.

This is still the case and will remain so for most of the next decade at least.

However, the changes in leak detection requirements, coupled with the limits on existing refrigerants are also calling for a new approach which is why we have developed the Hybrid VRF system.

Why Hybrid VRF is different Hybrid VRF combines the very best of traditional chiller and flexible VRF air conditioning.

It not only offers the same design and installation flexibility as VRF with the same performance levels, it also increases occupant comfort by delivering a much more temperate off-coil temperatures.

The added bonus though is that it helps buildings comply with BS EN378, which restricts the amount of refrigerant that can be installed in occupied spaces.

It does this by using water as the heat transfer medium instead of R410A, R32, or any other refrigerant. And it completely removes the need for added leak detection in occupied spaces.

So, here is a technological solution that is already known to the industry that can help safeguard buildings against existing AND future legislation. 

What’s not to like?

Mark Grayston is Product Manager for Mitsubishi Electric’s advanced range of VRF and Hybrid VRF air conditioning systems.  

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If you would like more information on these topics and Hybrid VRF please visit