As such, the government has introduced a series of instruments to facilitate the renovation of residential buildings Most of these instruments are provided through the state fund KredEx in the form of a renovation loan and a reconstruction grant. The renovation loan is a long-term and has a low interest rate and is offered to apartment associations, building associations or any community of more than three apartments built before 1993. Within a project of Bulgarian Ministry of Regional Development and Public Works and UNDP, launched in 2007, fifty multi-family buildings were renovated to demonstrate the benefits of home energy efficiency improvements.