SILVIO PELLICO SCHOOL

The project consists in a retrofitting action on the existing building, energetically insufficient before the intervention.

The existing prefabricated casing with cross-laminated timber panels, which were mechanical dry-assembled to
the RC frame structure. This building solution has enabled a significant improvement of the air-tightness and the thermal wave phase shifting (U=0,159W/m2K). The mineral wool thermal insulation covers the entire building, starting from the inward insulation of the concrete slab with 100mm of polyurethane foam (U=0,133W/m2K).

The existing windows were replaced with thermally-broken aluminium windows with double glazing units, low air permeability and solar factor 0,6. The building was also provided with solar shades to protect the indoor areas against the solar radiation and further minimise the building energy consumption in summer.

The green roof (U=0,209W/m2K) aims to enlarge the permeable surface of the area and to improve the energy performances of the roof.

The upgrade of the plant system contributes to achieve the N-Zeb qualification. The whole existing plant system has been dismissed and replaced with more energy efficient ones, that guarantees low energy consumption.

The photovoltaic system on the roof supplies the energy need of the building: 210 photovoltaic panels, 67,2 kWp in total (+10% beyond the norm).

A new heating/cooling system (type VRV-VRF) was fitted, for a total of 5 external units complete with heat-reclaim system and thermostat, and interlinked to the BMS system for a closer control of the temperature and energy consumption.

New boilers, for the production of the domestic hot water, are coupled with roof-top heat pumps and fitted with carbon dioxide probe in order to modulate the introduction of outside air and reduce the energy consumption.