Performance of buildings. Calculation of energy required for heating and cooling of rooms. General criteria and validation procedures

This technical document establishes a unified framework for evaluating thermal performance requirements in residential and non-residential buildings. It focuses specifically on calculating the energy demand necessary for space heating and cooling systems within individual rooms. The methodology outlined provides standardized procedures for determining these energy loads, ensuring consistency across different evaluation scenarios. A key component of this work is the inclusion of rigorous validation protocols designed to verify the accuracy of the calculation results. By adhering to these guidelines, practitioners can achieve reliable assessments of building energy efficiency. The approach integrates general criteria with specific verification steps, allowing for the systematic analysis of thermal dynamics under various conditions. It serves as a reference for professionals involved in the design, simulation, and assessment of building energy systems. The content addresses the fundamental principles required to quantify heating and cooling needs accurately. This facilitates the development of effective energy management strategies and supports the implementation of broader sustainability goals within the construction sector. The document ensures that all calculations follow a coherent and reproducible logic.