What metering device is most common on apartment iar conditioners?

The most common metering device used in apartment air conditioners is the thermal expansion valve (TXV). It regulates the flow of refrigerant based on the cooling demand, ensuring optimal performance and efficiency. In some simpler systems, capillary tubes may also be used as a metering device, particularly in smaller or window-mounted units. Overall, the TXV is favored for its ability to adapt to varying load conditions.