BS EN 16001 Energy Standard BS EN 16001:2009 Energy management systems. Requirements with guidance for use BS EN 16001 will help your organisation establish the systems and processes necessary to improve energy efficiency. This will help to save money and reduce greenhouse gas emissions through systematic management of energy. BS EN 16001 can be used independently or integrated with any other management system. To facilitate its use, the structure of this standard is similar to the structure of BS EN ISO 14001. Third Stone Limited can help your organisation reach this standard