Samborong, as the capital and an important port city of Central Java Province, has a tropical rainforest climate. It experiences high temperatures and high humidity throughout the year. Due to the frequent port trade and industrial production activities, the outdoor air is prone to contain dust, moisture and minor pollutants. The ERV ventilation system can efficiently exchange indoor and outdoor air, ensuring air quality. It can also recover the coldness and humidity from the exhaust air, significantly reducing the energy consumption for air conditioning dehumidification and cooling. It is an excellent ventilation solution for various places in the region, and is particularly suitable for the following scenarios. 

The office buildings in Sumbawa Leong are the core application scenarios of the ERV system. As the administrative, commercial and financial center of Central Java, the downtown core business district and the areas around the port are home to government agencies, trading companies, logistics enterprises and manufacturing headquarters. These places have a high concentration of people and are mostly enclosed spaces for long periods. The interiors are prone to accumulate carbon dioxide, office equipment odors and human turbidity. This not only affects work efficiency but also may cause discomfort among employees. The ERV system continuously introduces filtered fresh air, efficiently expels polluted air, and simultaneously recovers the coldness and humidity in the exhaust air, reducing the dehumidification and cooling load of the air conditioning system and helping enterprises lower their long-term operating costs. It is particularly suitable for office areas of enterprises engaged in port trade, agricultural product processing, mechanical manufacturing and other industries, as well as business spaces of cross-border logistics and financial service companies. 

The hotels and accommodation facilities adjacent to the port have an especially urgent need for the ERV system. Tri Bablon is an important maritime hub in Indonesia. Surrounding the port and in the city, there are numerous business hotels, chain accommodations, and crew-supporting apartments, mainly serving port workers, cross-border traders, logistics drivers, and tourists. The guest rooms, lobbies, restaurants and other areas in these places have a high volume of traffic. Due to the coastal environment, the air humidity is higher, which can lead to problems such as wall dampness and room odors, directly affecting the guest experience. The ERV system can effectively remove indoor moisture and odors, keep the air in public areas and guest rooms fresh and dry, and at the same time, through the energy recovery function, reduce the energy consumption of air conditioning. It can enhance guest satisfaction while optimizing operating costs. Especially for business hotels near Tanjong Pera Port and mid-to-high-end accommodations for international crew members, the cost-effectiveness and practical value of installing the ERV system are extremely high. 

Malls and comprehensive retail centers are important adaptation sites for the ERV system. The central city mall in Sanbao Long, the cross-border commodity retail center near the port, and the community commercial complex are the main consumption gathering places for local residents, port workers, and tourists. These places have enclosed spaces and high foot traffic, and the turbid air generated by people's activities, the cooking fumes from food stalls, and the odors from goods mix together, which can easily lead to a decline in indoor air quality. The ERV system can efficiently exchange indoor and outdoor air, quickly dilute and discharge various odors, keep the air fresh in the malls, create a comfortable shopping environment, and at the same time, the energy recovery function can reduce the energy consumption of the air conditioning system and lower operating costs. After installation in large central city comprehensive malls and characteristic commodity retail centers near the port, they can significantly increase customer stay time and consumption willingness. 

The ERV system is highly compatible with schools and medical institutions, and its demand priority is high. The primary schools, vocational colleges and universities in Sanbao Long have densely populated areas such as classrooms, libraries and laboratories. Students spend long periods of time in poorly ventilated environments, which not only reduces learning efficiency but also increases the risk of respiratory diseases transmission. The ERV system can provide stable and continuous fresh air, reduce indoor pollutant and bacteria concentrations, and create a healthy learning environment for students. The local hospitals, clinics and port medical centers have strict requirements for air quality and ventilation efficiency. Especially in areas such as outpatient halls, wards and laboratories, continuous ventilation is necessary to prevent cross-infection. The ERV system can ensure that the air quality in the medical environment meets standards, effectively recover energy, save the operating costs of medical institutions, and meet the dual needs of health protection and energy conservation and emission reduction. 

Industrial plants and production workshops are the distinctive application scenarios of the Sanbao Long ERV system. As a major industrial hub in Central Java, the area is home to numerous enterprises engaged in agricultural product processing, textile manufacturing, chemical production, mechanical manufacturing, and port-related processing. The production workshops, clean rooms, and storage areas of these factories have strict requirements for temperature, humidity, and air quality: agricultural product processing plants need to control humidity to prevent food and fruits from spoiling, textile factories need to adjust humidity to avoid static electricity in fibers, and chemical and mechanical factories need to promptly discharge the slight harmful gases and dust produced during the production process. The ERV system can precisely maintain stable indoor temperature and humidity while efficiently replacing the air, eliminating production pollutants, and reducing the energy consumption of the air conditioning system through energy recovery. This ensures that the production environment meets standards and enhances production efficiency. It is particularly suitable for production workshops of local such as rice processing， palm oil extraction， textile printing and dyeing， etc. 

High-end residences and coastal communities are also suitable for installing ERV systems. As the living standards of the residents in Sanbao Long have improved, the high-end residences in the urban area, coastal communities, and industrial parks, as well as the high-quality apartments provided as， have increasingly demanding requirements for indoor comfort， health， and energy efficiency. The local area experiences high temperatures and humidity throughout the year， and the coastal areas have higher levels of air salt content and humidity. Opening windows for ventilation is prone to being affected by outdoor noise， dust， mosquitoes， and high-humidity air. The ERV system can achieve efficient indoor-outdoor air circulation without opening windows， filtering out outdoor dust， salt， and pollutants， balancing indoor humidity， preventing wall dampness and furniture mold， and simultaneously recovering energy to reduce air conditioning energy consumption. It creates a quiet， clean， dry， and energy-efficient living environment for residents， especially suitable for families with elderly members， children， as well as port workers and enterprise executives who have higher requirements for the quality of life.