Magelang (in Central Java, Indonesia) has a tropical humid climate, with high temperatures, high humidity, abundant rainfall, and small temperature differences between day and night. Buildings are generally well-sealed and rely heavily on air conditioning. ERV (Energy Recovery Ventilation) is suitable for priority placement in areas with high population density, strong sealing, high requirements for temperature and humidity / air quality, and high energy sensitivity, such as places where there is a lot of people, enclosed spaces, high demands for temperature and humidity / air quality, and high energy consumption sensitivity. At the same time, considering the local characteristics of frequent rainfall, high humidity, and high levels of dust / pollen, models with high-efficiency filtration + full heat recovery + mold prevention design should be selected to avoid condensation and mold growth.

Firstly, in urban core commercial and office areas, such as office buildings, banks, insurance companies, chain hotels and boutique inns in the city center, these places are fully enclosed all day, have a high population density, CO₂ levels are prone to exceed the limit, and air conditioning operates for a long time with high energy consumption. ERV can continuously replace fresh air while recovering the cold energy in the exhaust air, significantly reducing the air conditioning load, filtering outdoor pollen, dust and humid air during the rainy season, avoiding mold and unpleasant odors indoors, improving the comfort of work and accommodation, and being particularly suitable for high-rise buildings without natural ventilation.

Secondly, in educational and medical facilities, including primary and secondary schools, university teaching buildings / libraries, private hospitals, clinics and rehabilitation centers. School classrooms and laboratories have high population density and poor ventilation, which is prone to spreading bacteria. ERV can achieve continuous fresh air replacement, combined with HEPA filters for filtration, reducing the risk of cross-infection, while recovering heat to reduce air conditioning energy consumption; hospital wards, operating rooms, pharmacies, etc. have extremely high requirements for air quality and temperature and humidity stability. ERV's isothermal humidification / dehumidification (can be equipped with electrode humidifiers) and full heat recovery can maintain indoor cleanliness, constant temperature and humidity, avoiding equipment moisture and drug deterioration caused by high humidity during the rainy season, and meeting the quiet and low-noise requirements of medical facilities.