In general, air conditioning systems work by circulating cooled air throughout a space to lower the temperature and humidity. Wall-mounted systems are a type of air conditioner that is installed on a wall and can be used to cool a single room or an entire home. These systems typically have an indoor unit (which is installed on the wall) and an outdoor unit (which is installed outside the home). When shopping for an air conditioning system, it is important to consider factors such as the size of the system (in terms of both power and physical size), the efficiency of the system, and any additional features or functions that may be useful. It is also a good idea to read reviews from other users and compare prices with similar products to ensure that you are getting a good value.