The regional phase of the International Training Program ’Efficient Energy Use and Planning 2015C’ was held in Warsaw, Poland from 11 – 20 January 2016.This is phase 4 of the EE2015C training program and the regional phase was implemented in collaboration between LIFE Academy, Sweden and WSP, Poland. 24 participants from Eastern Europe met again to discuss the progress of their change projects, learn from Poland’s energy efficiency experience through lectures and study visits.