Effects of Mass Tourism in Croatia and the Attempt for a More Sustainable Approach Community Energy in Central Europe – policy overview Renewable Power-to-Heat in Hajnówka – summary Renewable Power-to-Heat in Hajnówka EUKI Interview: Commencing Project on Energy Communities in Central Europe Energy Efficient Retrofit Guidebook International Overview of Current Practices by Retrofit HUB Training Activities by Retrofit HUB Energy Efficient Renovations in Practice Training Series Energy Renovation of Multifamily Buildings – Obstacles, Solutions and Opportunities