CO2 Heat Pumps work exclusively with eco-friendly refrigerant CO2 (R-744). These high-temperature heat pumps can provide hot water temperatures up to 110°C while simultaneously providing cooling down to -5°C.
To talk about heat pumps it is essential to start from the beginning, i.e. to discuss heat itself. Today the notion of heat is so commonplace that the term is used in a number of senses without much distinction being made among them.