Residential central air conditioners and heat pumps are installed as part of a homes central heating and cooling system. They use ducts to distribute cooled or dehumidified air to more than one room. Residential central air conditioners and heat pumps include split system central air conditioners and heat pumps; single package central air conditioners; single package heat pumps; small-duct high-velocity products; and space constrained products. IEA/IRENA Global Renewable Energy Policies and Measures Database © OECD/IEA and IRENA, [November 2020]