However, there are also some drawbacks to air conditioners with a pipe. One limitation is that the length of the pipe can affect the efficiency of the unit. Longer pipes can decrease the airflow, which may reduce the cooling capacity of the air conditioner. Additionally, the need to expel hot air outside can be a challenge in some situations, such as in apartments or buildings with strict regulations on external modifications.

If the hose is connects the air conditioning evaporator, receiver/drier, and bottom connection of the condenser, It is the liquid A/C hose, the hose size is #6 5/16, the small hose in the car air conditioning system.