User Manuals, Instructions and Guides for CIBSE products.
CIBSE 2025 Weather Data User Guide
Learn about CIBSE Weather Data [2025 Release], featuring Test Reference Years (TRYs) and Design Summer Years (DSYs) for energy assessments and overheating risk evaluations. Explore hourly epw files for 28 UK Zones with climate data scenarios up to 2080s.