42 Design for others in the field of heating, cooling, ventilation and refrigeration (HVAC&R); Designing of machines, apparatus, instruments or systems composed of such machines, apparatus and instruments; Engineering; Technology consultation in the field of heating, cooling, ventilation and refrigeration (HVAC&R); Development of new technology for others in the field of heating, cooling, ventilation and refrigeration (HVAC&R); Industrial research in the field of heating, cooling, ventilation and refrigeration (HVAC&R); Research and development and consultation related thereto in the field of heating, cooling, ventilation and refrigeration (HVAC&R)