Ms. Béatrice L'Hostis
Project coordinator – Air Liquide
Phone: +33 (0) 1 49 83 55 09

About Hyindoor


Hyindoor addresses knowledge gaps regarding indoor hydrogen accumulations, vented deflagrations, and under-ventilated jet fires. This includes improved criteria for indoor Hydrogen and Fuel Cell (HFC) systems to avoid hazards; sizing of openings for natural ventilation and specification of forced ventilation systems; and sizing of the vent area for deflagration mitigation.

Analytical, numerical and experimental studies in Hyindoor will be guided by the foreseeable release conditions for FC systems in early markets’ power range and enclosure characteristics.

The generated knowledge will be translated into safety guidelines, including specific engineering tools supporting their implementation. Recommendations will be formulated for evolutions in EU and international Regulations, Codes and Standards frameworks, to support the safe introduction of HFC in early markets.


The final guidelines and recommendations will be published on this website – section Guidelines.


The Hyindoor project is funded by the Fuel Cells and Hydrogen Joint Undertaking, a public-private partnership between the European Commission, fuel cell and hydrogen industries represented by the NEW Industry Grouping and the research community represented by the Research Grouping N.ERGHY.