Air Conditioning and Heating as Demand Response in Modern Power Systems.- Aggregated Air Conditioners for Providing Operating Reserve.- Heterogeneous Air Conditioner Aggregation for Providing Operating Reserve considering Price Signals.- Air Conditioner Aggregation for Providing Operating Reserve considering Lead-Lag Rebound Effect.- Inverter Air Conditioner Aggregation for Providing Frequency Regulation Service.- Integration of Flexible Heating Demand...