Energy Performance of Buildings Directive Commission guidance on IEQ in cost-optimality 30 July 2025 2 min read Home › Policy Updates › Commission guidance on IEQ in cost-optimality New guidance from the European Commission now enables Member States to monetise the health and GDP benefits of IEQ improvements in cost-optimality calculations under the EPBD. This content is available to Eurovent members only. Please log in or register to access this content.