Tertiary buildings in urban areas such as offices, schools, supermarkets, logistics centres or hospitals are a significant source of heat which could be recovered. All of them require some kind of cooling or air conditioning, e.g. the fridges and storage rooms of supermarkets, surgery rooms in hospitals or fridges and walk-in coolers in restaurants. During cooling, excess heat is produced that can be reused for heating purposes. These type of tertiary buildings are present in and usually in close vicinity to residential buildings or other tertiary buildings where heating is needed.

ReUseHeat focusses on one type of tertiary building that is present in every city: hospitals. There are approximately 7,154 hospitals in Europe. Every hospital has considerable cooling needs and the excess heat from the cooling system can be captured and used in heat networks. Considering a conservative potential waste heat recovery tertiary buildings, up to 10 TWh year of heat could be supplied from this low-carbon source.

The ReUseHeat demonstration of an advanced system for the recovery and reuse of waste heat from the cooling of a tertiary building will open new opportunities in additional hospitals and other tertiary buildings across the EU. The system will be able to operate in circumstances with both simultaneous heating and cooling demands, or without, such schools and offices where heating or cooling is needed depending on the season.