The villa hotel, located in Moganshan, Deqing County, Huzhou City, Zhejiang Province, experiences a subtropical humid monsoon climate at an altitude of 388 meters. Despite the low temperatures in summer, with July and August averaging only 24.1 degrees Celsius, winters can be chilly, with temperatures in the mountainous area dropping to minus 15 degrees Celsius. With 72 villas, ensuring high-quality air conditioning and hot water systems is crucial for delivering excellent service and enhancing the customer experience. To address the demands of the mountainous terrain and the need for hot water, Jaga has implemented the following measures: 1. Utilization of a DC inverter + jet booster triple heat pump system to provide heating, cooling, and domestic hot water. This advanced technology ensures efficient energy usage and optimal comfort for guests. 2. Harnessing solar energy for preheating domestic hot water, reducing energy consumption and promoting sustainability. 3. Modification of the heat pump peripheral control program to suit the unique characteristics of the project, enhancing performance and reliability. By adopting an air source heat pump system for year-round heating, air conditioning, and domestic hot water supply, the villa hotel can meet the diverse needs of guests while maintaining a comfortable and inviting atmosphere amidst the mountainous landscape.