View Natural Refrigerants List US. So, this is the top common list of refrigerants. Examples of natural refrigerants are hydrocarbons, ammonia, carbon dioxide and water.
With the exception of ammonia, natural refrigerants pose no real threat if accidentally released into the environment.
They are not created in a laboratory like some of the other refrigerant because natural refrigerants already exist in nature they are very environmentally friendly. These products were used as refrigerants prior to the 1950s, before fluorocarbon. Co2 has many excellent advantages in engineering applications the us environmental protection agency (epa) already approved a list of hcs as substitutes for cfcs and hcfcs for refrigerators and freezers. With the exception of ammonia, natural refrigerants pose no real threat if accidentally released into the environment.