Hy4HoGa – Hygiene concepts for large spaces in hotels and restaurants

Building system solutions
© Fraunhofer IBP
Indoor Air Test Center am Fraunhofer IBP.

Gastronomy, the hotel industry, the event industry, and »suppliers« such as breweries, caterers or exhibition booth builders are suffering greatly from the measures required to contain the SARS-CoV-2 pandemic. Within the scope of the »Hy4HoGa« project, ways to reduce the risk of infection via aerosols in the hospitality industry, and thus how large, highly-frequented spaces can be used safely at affordable cost, is being investigated by Fraunhofer IBP in collaboration with the Bavarian hotel and restaurant association »Bayerischer Hotel- und Gaststättenverband DEHOGA Bayern e.V.« and the Bavarian industry association »vbw - Vereinigung der Bayerischen Wirtschaft e. V.«

Project goals

New solutions to reduce viral concentrations in the air are called for or existing ones adapted. These must be affordable, and quick and easy to install without the need for major construction work. The aim is to develop recommendations and prototype hygiene concepts for various room types - from bars and pubs to event and conference rooms.

Current project status

In the filter test setup and model room at Fraunhofer IBP’s »Indoor Air Test Center«, the researchers are using corona surrogate viruses to assess the effectiveness and suitability of selected air purification technologies (e.g. HEPA class filters, UV and plasma disinfection, etc.) in typical scenarios. Besides determining efficiency and degradation rates, any by-products formed are analyzed to evaluate their impact on indoor air quality. Thanks to additional simulations of air and aerosol propagation, potential installation positions and/or the number of devices required can be ascertained. The data from the experiments will ultimately be implemented to validate simulation models that will be used to calculate other typical scenarios in the hospitality industry.


  • Bavarian State Ministry of Economic Affairs, Regional Development and Energy

Project partners

  • Bayerischer Hotel- und Gaststättenverband DEHOGA Bayern e.V.
  • vbw – Vereinigung der Bayerischen Wirtschaft e.V.