How much r22a do you put in a r22 system?

When retrofitting an R22 system with R22A, it's important to follow the manufacturer's guidelines and local regulations. Generally, you would use the same charge amount as specified for R22, but adjustments may be necessary based on the system's specific requirements and performance after the retrofit. Always ensure to check for leaks and proper system functionality after the conversion. Consulting with a certified HVAC technician is recommended for precise guidance.