Australia companies offer a wide variety of refrigerants selections. The two chemicals that are becoming popular are ammonia and carbon dioxide because of the fact that both are naturally occurring. Ammonia is a by-product of putrefaction process whereas carbon dioxide is a by-product of respiration. Due to the fact that these chemicals are naturally occurring, they are easy to source and hence, they are available in very cheap price tags. Visit http://www.ammoniarefrigerationnsw.com.au/