New Energy Efficiency Regulation to Promote Inverter ACs in Brazil

The new regulation changed the rating criterion from Energy Efficiency Ratio (EER) to the Cooling Seasonal Performance Factor (CSPF) or IDRS in Portuguese based on ISO16358: Air-cooled air conditioners and air-to-air heat pumps – Testing and calculating methods for seasonal performance factors. The new rating matches the actual situation of air conditioner use much more closely by considering partial load, the thermal load of the air-conditioned environment, and the outdoor temperatures that vary widely, not only throughout the year, but also on the same day.