Ventilation function is the latest technology used in wall-mounted air conditioning to ensure fresh air in the home, prevent the occurrence of air-conditioning diseases, and make it more comfortable and reasonable to use. In addition, quiet and energy-saving design is also important to enable you to sleep until dawn. Some wall-mounted air conditioners have ultra-small outdoor units. If you plan to put the outdoor units on the balcony, this is also a good choice. As for cold and warm wall-mounted air conditioning, attention should be paid to the selection of air conditioning with heating capacity greater than refrigeration capacity to ensure the heating effect. If there is an electric auxiliary heating function, it can ensure that under ultra-low temperature environment (minimum - 10 degrees Celsius) can also be heated (outlet temperature is above 40 degrees Celsius).