Abstract
One of the major part of energy demand of a building goes to heating and hot water in countries with a cold climate. It is now clearly recognised that modernization of public buildings must be a mix of measures and not only cover the renovation of building components (e.g. roof, walls, windows etc.), but also HVAC systems and heating sources. Aim of any renovation of a public building is to improve the physical aesthetic, the microclimate in the building and reduce primary energy demands. Seventeen projects with solar thermal systems and heat pumps were implemented in Lithuanian hospital buildings by using Swiss and Lithuanian state funding in 2016. This paper presents the cases and monitoring data of three different integrated solar thermal and heat pump systems in Lithuanian hospitals and prospect of solar thermal and heat pump systems in relation to traditional energy prices, technical barriers and government policy as well as potential of these systems.