One of the many projects in the heat sector already implemented in Lithuania is the renovation of an apartment building in Varena to 100% renewable heat energy and hot water supply that was completed in 2013. While the district heating system in Varena is already fired by biomass to a degree of 97 % the aim of the project was to prove a 100% off-grid solution is possible as well. To cover the heating needs of the 40 apartments in the building from green sources, 7 wells were drilled to a depth of 100m and connected to a heat pump, while hot water is provided by solar collectors on the roof. The residents covered 40% of the total cost, the city and the JESSICA programme each covered another 30%. Another article on the project can be found here.