One of the results of analyzing monitored projects in the framework of IEA SHC Task 28 "Sustainable Solar Housing” offer valuable lessons how to design housing with extremely low non-renewable energy consumption. Compact, tight and highly insulated buildings with an average envelope U-Value lower than 0.5 W/m2K facade area and a high efficient intelligent home systems are the key. At such levels, a very efficient ventilation system is also a must. Active and passive solar strategies can still contribute a valuable fraction of the remaining energy demand. All together, their are numerous combinations of strategies to achieve the same result. High performance has been demonstrated in very diverse climatic regions in Europe with much success.

The subsequent reduction in primary energy leads to both drastic reductions in the environmental impact of a house and impressive savings in the household budget of the occupants.

Many thanks all colleagues for their support, in contributing monitoring and analytical data. Also thanks to the Projekttrager PTJ Julich for the support and the German Ministry of Economics for the financial funding of the project monitoring as well as the Swiss Federal Office of Energy for funding the Operating Agent of this IEA Task.

Literature

S. R,. Hastings, Sustainable Solar Housing, Solar 2000, Gleisdorf, A

K. Voss, A. BUhring, M. Ufheil, Solarenergienutzung und Energieeinsparung im

Geschosswohnungsbau — Erfahrungen und Ergebnisse aus realisierten und geplanten Projekten, Soarthermischwes Symposium, Staffelstein 2002

C. Russ, S. R. Hastings, K. Voss, Zukunft fur Zuhause, Sonnenenergie 2, 2004, S.31 — 35

IEA Task 28 „Sustainable Solar Housing“, Internal working dokuments for building characterisation and monitoring of the demonstration projects Gemis 4. 1 Globales Emissions Model Integrierter Systeme, Februar 20O2