Dual benefit - comfort and cost-optimised air flow concepts for energy-efficient residential buildings


Project leader University of Innsbruck: Rainer Pfluger
Project staff: Gabriel Rojas-Kopeinig, Mattias Rothbacher, Harald Malzer (PHI), Elisabeth Sibille
Project partners:
- Passive House Institute, Innsbruck
- Neue Heimat Tirol, non-profit housing association
Funding organisation: FFG / Haus der Zukunft plus, 3rd call for proposals:
Duration: 01.03.2011 - 28.02.2013
Homepage: www.phi-ibk.at/luftfuehrung
Ventilation systems for residential buildings can be planned according to the so-called cascade principle. This project develops the planning principles for this and analyses the necessary overflow openings with regard to pressure loss and airborne sound insulation.

Scheme of cascade ventilation
Publications (University of Innsbruck)
- "Overflow elements for ventilation of residential buildings: Layout data and design ideas", G. Rojas, M. Rothbacher, and R. Pfluger, in Tagungsband:16th Int. Passivhaus-Tagung, 2012, pp. 661-662.
- "Overflow elements: Impacts on energy efficiency, indoor air quality and sound attenuation", G. Rojas, M. Rothbacher, and R. Pfluger, in 33rd AIVC and 2nd TightVent Conference, 2012, pp. 96-100.
- "Overflow elements, impacts on energy efficiency, air quality and sound attenuation", Rojas, Rothbacher, Pfluger, International Passive House Conference 2012, Hannover.
- "Sensitivity analysis of indoor air quality with residential ventilation", Rojas, Pfluger, Sibille, International Congress E-Nova 2012, Pinkafeld.
- "Optimisation of dwelling floor-plan configuration for cascade ventilation", Sibille, Pfluger, International Passive House Conference 2013, Frankfurt.
- "Comfort and cost-optimised air routing concepts for energy-efficient residential buildings", Gabriel Rojas, Elisabeth Sibille, Rainer Pfluger, Jahrbuch TGA-Planung 2014, WEKA Verlag, Vienna
- "Cascade ventilation - air exchange efficiency in living rooms without their own supply and exhaust air", G. Rojas and R. Pfluger, in Conference proceedings: 18th International Passive House Conference, 2014.