An updated version of the SBEM energy-calculation software is available for download. SBEM version 1.2a enables designers to demonstrate compliance with Part L2A of the Building Regulations for non-domestic buildings that came into effect in April. The main changes include the following. • Allowing demonstration of compliance with equivalent Building Regulations in Northern Ireland. • Revised default values for thermal bridges. • Simplifications of some HVAC definitions. • Easier entry of data applicable to the whole building. • Modifications to underlying databases to improve accuracy.