This document summarizes NHS Sustainability Day 2014, which focused on making sustainability part of doing business. The day included presentations on heat networks, community energy strategies, water conservation strategies at Barts Health NHS Trust, and Carillion's approach to enabling low carbon economies and sustainable communities. It concluded with a workshop from EDF Energy on understanding energy usage and costs, highlighting opportunities for energy reduction, generation, and revenue from balancing services. The overarching goal was providing NHS organizations with practical information on improving sustainability performance and reducing costs.