Ajuntament Llinars del Vallès, EnerPHit Plus
Nestled in the Vallès Oriental region, the newly retrofitted Llinars del Vallès Town Council office stands as a pioneering achievement—the first administrative building in Catalonia to earn Passivhaus-EnerPHit certification
Ajuntament Llinars del Vallès, Catalonia, EnerPHit Plus
Passivhaus Certification
Description
A Milestone in Municipal Sustainability: Llinars del Vallès Town Council Office
Nestled in the Vallès Oriental region, the newly retrofitted Llinars del Vallès Town Council office stands as a pioneering achievement—the first administrative building in Catalonia to earn Passivhaus-EnerPHit certification. This landmark project sets a new benchmark for deep energy retrofits in public infrastructure.
The renovation delivers an impressive 90% reduction in heating and cooling demand, made possible by a robust envelope upgrade:
- 12 cm mineral-based aerated concrete ETICS on the façades
- 10 cm XPS insulation on the roof
- Smartwin timber-aluminium windows, Passivhaus-certified, featuring low-e, argon-filled triple glazing
Airtightness was rigorously addressed, achieving n50 = 0.88 ach, well within Passivhaus standards.
Ventilation is provided by a Zehnder CARMA 9035 unit, also Passivhaus-certified, boasting an 84% heat recovery rate. For heating, the building taps into a biomass district heating network, distributing warmth via wall-mounted fan-coils—which also deliver summer cooling through a 30 kW chiller.
To further reduce operational carbon emissions, a 19.3 kWP solar PV array supplies approximately 70% of the building’s annual energy needs. Real-time monitoring systems track both energy consumption and indoor air quality, ensuring performance transparency and occupant comfort.
Photos: GGV Arquitectura
Links:
PEP (Spanish Passivhaus Platform).