In this study we aim to shed light on waste heat from commercial refrigeration, which is common but unnecessary. Excess heat is the heat which is not recovered, although it is possible to do so. We include heating for existing buildings: grocery stores as stand-alone, or within another building. VariousSwedish perspectives of the parties involved, tenant and landlord, are discussed. Theoretically and technically, it is not difficult to distributeexcess energy from a tenant to another receiver, which in turn uses the energy. However, to meet energy goals regarding energy consumption for heating buildings requires new and efficient approaches. The technique is already known and availableon the market. We suggest that availableenergy and heat recovery projects, contracts and agreements maysignificantly enhance the possibility of creating viable energy efficiency projects, and include excess heat. Results include lessons learned from the parties.