TN 76: Overheating assessment & ventilative cooling in national building codes regarding indoor environmental quality and energy performance

This document provides practitioners with an overview of the current status of national building codes regarding indoor environmental quality (IEQ) and energy performance, with a focus on how they address overheating and ventilative cooling in buildings. The review focuses primarily on building codes applicable to new buildings in cold and moderate climates, where regulations have traditionally prioritized heating performance. To support this objective, we conducted a cross-country survey in 2024-2025, gathering insights into how different countries and regions are tackling both overheating and ventilative cooling.