Rathco is an engineering company that specializes in low temperature and ambient temperature district energy system study, design, and support through construction and operation. They utilize only low and zero carbon sources of energy like geothermal, sewer energy, air-source heat pumps and biomass. Their focus on energy leads them to work for cities, universities and colleges, property developers, thermal utilities and indoor growers (agriculture). They offer a unique set of skills in combination with Canadian experience. Their core team was trained in Denmark and the UK on district energy systems and they have evolved that training and experience in the Canadian market to be more agile and adaptable to market forces.