How do hotels choose air conditioning units?

1, refrigeration capacity, heating capacity, air supply volume, static pressure in the machine and residual pressure. These are all necessary.

2. According to different uses, some parameters may be needed, such as return air volume, fresh air volume, exhaust air volume, dehumidification volume, humidification volume, height, width, length, input power, voltage and so on. Mainly consider the size of the air-conditioned room, but also consider the number of air changes. The room volume determines the power of refrigerant and heat medium. The number of air changes per minute is the number of air changes per unit volume of the room, generally not less than 6 times. The number of air changes determines the size of the fan and air duct.