Which refrigerant is mentioned with a system using a TXV?

A thermal expansion valve (TXV) is a device used in HVAC systems to regulate the flow of refrigerant into the evaporator coil based on cooling demand and system conditions. R-410A is the modern refrigerant commonly associated with systems that utilize a TXV. This association arises from the transition to more efficient and environmentally friendly refrigerants, as R-410A has largely replaced older refrigerants like R-22 due to its favorable thermodynamic properties and lower ozone depletion potential.

R-410A operates at higher pressures than R-22 and is designed for use in systems that have specific components, such as a TXV, which can handle these pressures and assist in maximizing system efficiency. Therefore, when referencing systems that specifically mention the use of a TXV, R-410A is the most applicable refrigerant as it is widely used in new installations that aim to meet current energy efficiency standards and environmental regulations.