This publication provides practical criteria and guidance for the sustainable procurement of energy-efficient and climate-friendly air conditioners and air-to-air heat pumps. It translates sustainable procurement principles into technical specifications, verification requirements and bid-comparison tools covering equipment type and capacity, energy performance, operating conditions, controls, lower-GWP refrigerants, safety, maintenance, warranty and availability of spare parts, life cycle costs, environmentally sound end-of-life management and social criteria. It also includes an accompanying tool for comparing compliant offers based on life cycle costs and greenhouse gas emissions. The publication aims to help procurers reduce energy use, emissions and life cycle costs while accelerating the uptake of sustainable cooling and heating technologies.