Abstract In this study, a concept of air-source heat pump using heat pipes as heat radiator system (ASHPP) for room heating was proposed. The heat pipes radiator was developed to replace the heating terminal equipment used in traditional heat pump plants. A tested room with artificial load was constructed and an experimental apparatus of ASHPP system was developed. Heat radiator performances with different kinds of refrigerant and different refrigerant mass filling ratio of heat pipe have been experimentally investigated. The variations of system heating performance under the condition of different indoor air temperature and outdoor air temperature were researched. The purpose of this study is to provide technique reference for developing new heat pump room heating system.