Sumbawa, as the provincial capital and important port city of Central Java Province, has a tropical rainforest climate. It experiences high temperatures and high humidity throughout the year, with abundant rainfall. It also possesses multiple functions such as port shipping, industrial production, commercial trade, and tourism culture. The building types include high-density residences, industrial plants, commercial venues, medical and educational facilities, and cultural and tourism buildings. Indoor spaces commonly face problems such as poor air circulation, high humidity leading to mold growth, and high energy consumption. The ERV ventilation system can provide efficient ventilation while recovering energy, filtering pollutants, and balancing temperature and humidity. These systems are particularly suitable for the following areas. Residential building

The residential buildings in Sanbao Long come in various forms, ranging from the high-rise sea-view apartments along the northern coast, the multi-story row houses in Chinatown, the low-density villa areas in Zanjidi Hills in the south, to the employee housing in the suburbs. All of these are suitable for installing the ERV system. Local residents often close their windows and rely on air conditioners to protect themselves from high temperatures, salt from the sea wind, and dust from the port. This leads to stale indoor air, accumulation of carbon dioxide, and high humidity. The humid environment can cause wall dampness, mold on furniture, and the coastal residences are also prone to damage from salt from the sea wind to appliances and building materials. The ventilation structure of the old residences in Chinatown is insufficient, which makes the indoor dampness and unpleasant odors even worse. The ERV system can continuously introduce fresh air that has been filtered through multiple stages without opening windows. It can intercept port dust, salt from the sea wind, and mold spores, remove the stale indoor air and excess moisture, and simultaneously recover the cold energy in the exhaust air to reduce the energy consumption of air conditioning for dehumidification and cooling. It can stabilize the indoor humidity within an appropriate range, creating a dry and clean living environment for different types of residences. It is especially suitable for families with elderly members, children, and those with respiratory sensitivities.