Passive solar systems make use of natural energy flows as the primary means of harvesting solar energy. Passive solar systems can provide space heating, cooling load avoidance, natural ventilation, water heating, and daylighting. This section focuses on passive solar heating, but the other strategies also need to be integrated and coordinated into a whole-building design. Passive solar design is an approach that integrates building components—exterior walls, windows, and building materials—to provide solar collection, heat storage, and heat distribution.

Despite the obvious environmental benefits, solar energy in all its forms, represent a flexible mean of ancillary energy supply, which can prove both economic and operational feasibility. PV-modules, thermal solar energy, and passive solar design are fundamental elements in integrated building design.

Demonstration Projects:
Tenants’ influence and CO₂ reduction, Copenhagen, Denmark
Improving efficiency of urban energy supply systems, France - Grenoble
A new "tune up" of innovative technologies, Italy - Brescia
Introduction of local district heating in spain, Spain - Vilanova Ila Geltru
Energy efficient technology to control costs of modern architecture, Finland - Kuopio
High-tech preservation of architectural heritage, Greece - Volos

Technology Producers
www.dasolas.dk
www.solarvent.dk