In conclusion, there are four different sizes for auto A/C hose in the most common car air conditioning system. If the vehicle is a bus or coach, it will be a bigger A/C hose, like 7/8 inch and 1 1/8 inch. Make sure which part of A/C hose is broken, like hose from compressor to condenser, you can know the exactly hose size.

The air conditioner with a pipe, also known as a vented air conditioner, works by drawing in warm air from the room and passing it over a cooling coil filled with refrigerant. The refrigerant absorbs the heat from the air, causing it to cool down. The cooled air is then circulated back into the room, while the hot air is expelled through a pipe to the outside.