| Year | Author | Article |
| 2004 | Feist, Wolfgang | Introduction - ventilation systems are indispensable for retrofits |
| 2004 | Köhler, Rolf-Georg | Modernisation of existing apartments using heat recovery devices from the housing sector perspective |
| 2004 | Pfluger, Rainer | Integration of ventilation systems in existing building stock - planning recommendations for devices, facilities and systems |
| 2004 | Laidig, Matthias; Werner, Johannes | Central ventilation system with heat recovery for a multi-family building - focus on fire safety, sound protection and regulation |
| 2004 | Pfluger, Rainer | Solutions for duct routing in existing building renovation |
| 2004 | Schleevoigt, Peter | Experiences with planning and execution of home ventilation systems with heat recovery in existing buildings |
| 2004 | Schulze-Darup, Burkhard | Integration of ventilation systems in retrofits from the perspective of the architect and construction manager |