Villa Castelli, Italy
Photo credit: ATLAS, Task 59 and Eurac





Villa Castelli, Italy

A 19th-century villa renovated in 2007 with a new roof, triple glazing, internal insulation, a geothermal heat pump and hidden solar PV. Its energy demand fell by 90%, to 18.27 kWh/m² a year, earning ClimaHouse R certification.

Building envelope and structure

The roof of the Villa was completely replaced with a new laminated wood structure, with double-crimped aluminium sheets acting as the roof skin. The windows and doors are triple glazed, filled with Argon and cased in a wood-aluminium frame. The exterior walls are insulated from inside.

Heating and energy

A heat pump with a geothermal plant (probes) supplies the production of heating and cooling and hot water. The heat for heating is distributed to the rooms through a radiant floor system. Electrical energy is produced with a PV-system, integrated in the roofing and not visible from outside. Micro wind turbines installed on the roof contribute to the production of electricity.

Energy performance

18.27 kWh/m²/y representing a 90% energy demand reduction leading to ClimaHouse R certification.

Project team