Flat plate collectors can be designed and installed for the integration of buildings by serving as building components or balcony fencing components in buildings, improving the safety and reliability of products or systems, meeting the requirements for integration of buildings and reducing the workload and complexity of installation. The water tank was designed to whether hang on the wall quietly or place at unused corners, which solves the problem of tight balcony place. Moreover, the complex water piping installation is hidden. The flow interface design generates interesting interaction with users.