Heating, ventilation, and air conditioning (HVAC) equipment consumes a substantial portion of energy in commercial buildings?roughly 40% of total building energy consumption depending on climate and other factors. Moreover, commercial buildings consume a significant proportion of the world?s energy supply, approximately 12% according to estimates from Oak Ridge National Laboratory. As concerns about the environmental impact of energy generation and uncertainty over future energy prices increase, efficiency improvements in HVAC equipment become more enticing. Nearly 6 years into the recovery from the 2009 financial crisis, persistent weakness remains in the commercial HVAC market. However, improvements in the economy and an increased focus on efficiency are driving increases in the market for energy-efficient HVAC equipment. In the near term, growth will be buoyed by the continuing economic rebound, together with concurrent increases in new commercial building starts, including green and efficient buildings. Over the mid-term, however, increasingly stringent regulatory environments will also drive growth in energy-efficient commercial HVAC markets globally, especially in Europe and Asia Pacific but also in North America. According to Navigant Research, global revenue for energy-efficient commercial HVAC systems is expected to increase from $22.8 billion in 2015 to $47.5 billion in 2024. This Navigant Research report analyzes the global market opportunity for energy-efficient commercial HVAC systems, including unitary systems, heat pumps, furnaces, boilers, variable refrigerant flow (VRF) systems, chillers, and geothermal heat pumps. The report provides a comprehensive assessment of the demand drivers, business models, and policy and regulatory factors. Global market forecasts for energy-efficient HVAC systems, segmented by region and technology, extend through 2024. The report also examines the major technologies related to these systems and profiles key industry players in depth.