Having completed energy efficiency in industry study in 2018, we pay attention to electronic appliances in 2019 since electricity contributes the most to the energy consumption in a building. Cooling system, among electric devices, has a significant share of the electricity consumption, so air conditioners represent by far the most significant potential for energy efficiency. In 2019, IESR is supporting Berkeley Lab as Indonesian partner in Indonesia Clean Energy Pathways Program. Here, IESR provides data and analysis to accelerate market transformation on air conditioners.