This is a comprehensive guide for selecting and sizing residential heating and cooling equipment. This manual documents the procedures that should be used to select and size residential cooling equipment, furnaces and heat pumps. These procedures emphasize the importance of using performance data that documents the sensible, latent or heating capacity for a wide variety of operating conditions. This manual also suggests sizing strategies for all types of cooling and heating equipment and it discusses the nuances of the presentation formats that are used by equipment manufacturers.