The concept of the modular vacuum cleaner for public buildings is designed to be sustainable through a specialized maintenance service provided by a company. This service ensures that the vacuum is regularly serviced and individual parts are replaced as needed. The vacuum cleaner is powered by solar energy during the day and works at night. The materials used in the construction of the vacuum cleaner are recycled aluminum and plastic,which helps to reduce the demand for new raw materials and decrease waste. The combination of the service, energy source and materials makes it a sustainable and eco-friendly solution for public spaces.