Final answer:
The type of refrigerant you would expect to find in a residential split system providing comfort air conditioning is R-410A.
Step-by-step explanation:
The type of refrigerant you would expect to find in a residential split system providing comfort air conditioning is R-410A. R-410A is a hydrofluorocarbon (HFC) refrigerant commonly used in modern air conditioning systems. It is more environmentally friendly and has replaced older refrigerants like R-22, which is harmful to the ozone layer.