Global Energy Efficient Hvac Systems Market By Type (Heat Pumps, Water Heating And Cooling Systems In Buildings, Efficient Air Conditioning Systems, Efficient Convectors/Coils Designs, Energy Storage (Heating And Cooling), And Regenerative Processes In Hvac), By Application (Residential, Commercial, Office Buildings, Education Centers, Healthcare Centers, Hospitality, Retail Centers, Industrial, And Others), By Region And Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends And Forecast 2019-2028