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Interview on new challenges of HVAC professionals

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CEN-CE Interview on new challenges, common methods and EU wide upskilling of HVAC professionals with Francis ALLARD, Emeritus Professor, La Rochelle University, Chair of the International Committee of AICVF, the French HVAC association.


CEN-CE: There will be a huge financial support from the European Commission via the Green Deal. A building renovation roadmap is announced. New challenges are nearly Zero Energy Building (nZEB) and low carbon footprint. What could be in your opinion the contribution of HVAC professionals? Do you think that the HVAC professionals are sufficiently prepared for the new challenges?


FA: HVAC professionals refer to a wide range of professionals, from research, design, installation and maintenance. Most of them are already focusing on introducing their best practices on low energy systems, on-site renewable energy production and promotion of low carbon footprints solutions. For new buildings, there are already plenty of very nice examples of Nearly Zero Energy Buildings, even positive energy ones, in every country and for a huge variety of climatic solutions. A huge effort has been made all over Europe in recent years. HVAC professionals have already acquired consistent experience but they have to adapt their practice to the necessary target of very low carbon foot prints buildings without any compromises on the Indoor Environment Quality (ie: comfort, health and safety). This means an evolution towards the definition of optimal solutions in the system design in terms of IEQ, installed power, energy performance and global cost. This holistic approach cannot be reached without a strong effort in formation of our professionals and an adaptation of the design tools.


However, the real challenge of the coming years is without any doubt, the renovation of the building stock with a strong reduction of the primary fossil energy use and of the carbon footprint of these renovated buildings. In this aspect, the role of HVAC professionals is even much harder. Very often the knowledge of the building to be renovated is weak, even the geometric aspects, the envelope characteristics and the materials are not well-known. The systems have to be redesigned completely, and the technical solutions for introducing new installation for heating, cooling or ventilation are much more difficult to handle than in a new building. In order to ensure the effectiveness of the renovation to comply with long term objectives as the carbon neutrality in 2050, a real renovation road map is necessary in order to avoid any “lock in effect” when selecting a technical solution. In these aspects too, HVAC professionals certainly need more specific information or formation.


CEN-CE: Energy Performance Certificates (EPC) are mandatory in all European Member States. Today there are more than 30 different EPC’s all over Europe. Sometimes national subsidies are directly related to the energy classes of national EPC’s. Do you think that European funding should be based on national EPC’s, to avoid double work, or based on a European Voluntary Certificate (EVC) mentioned in the Energy Performance of Building Directive (EPBD)? How in this case avoid double work and manage the coexistence of two EPC’s, a national and a European one?


FA: The problem of EPCs is a hard one and it is not easy to have a clear statement. When EPCs were implemented, the idea was to have a very quick estimate of the real energy performance of any building anywhere in Europe. We have to remember that before EPBD 2002, when we were buying or renting a building, we had absolutely no idea of its energy performance. The quick and wide implementation of EPCs in Europe was certainly a key element in order to promote energy performant buildings, and a big success. However, they have certain limits in considering the indoor quality (Comfort, IAQ) and the quality of the energy performance evaluation may vary a lot from one place to another. Thus, they certainly need to be improved.


Read the full interview here.