There are many functional buildings at school, such as teaching buildings, libraries, computer rooms, laboratories, conference rooms, etc. Each building has different functions and requires different solutions. Two kind of air-conditioning units solutions can be chosen. Firstly, renewable energy air-conditioning and hot water units. Secondly, water / ground source heat pump systems(include semi heat recovery and total heat recovery). The terminal solution contains: combined air conditioning unit, fan coil, fresh air ventilation unit and commercial air conditioning unit.