From G to D

The energy certificate for the property at Calle Cerrillo 31 demonstrates significant improvements in energy efficiency compared to the original pre-renovation rating. Initially classified as energy efficiency level G, the home now holds a rating of E for energy consumption (252.46 kWh/m²/year) and a superior rating of D for CO₂ emissions (45.97 kg CO₂/m²/year).

This upward shift by two steps in energy consumption and three steps in emissions highlights substantial enhancements in both comfort and environmental performance, particularly notable given the inherent challenges in renovating older Andalusian properties.

However, the recommended improvements on the certificate, such as external insulation, renewable energy (solar) and the installation of a centralized heat pump system, are practically unattainable. This impossibility arises due to local building codes, prohibiting solar installations, heritage preservation regulations, and the complexity associated with retrofitting older constructions methods and structures with external insulation – also prohibited by the building regulation in Zuheros..

Despite these constraints, extensive renovations were successfully implemented, including:

• Installation of four high-efficiency (Energy Rating A) split inverter air conditioning units.
• Replacement of all windows and doors with advanced solar-efficient aluminum fixtures featuring thermal bridge break – “puente térmico” .
• High-performance double-glazed windows designed specifically to reflect radiation and filled with inert gas to significantly minimize heat and cold transmission.
• Comprehensive internal insulation applied across all walls surrounding windows and doors.
  

These specific measures, although not fully reflected in the technical rating due to evaluation constraints, have significantly enhanced the home’s livability, ensuring optimal indoor comfort year-round.