]Dabere na ihe mejupụtara kemịkalụ, enwere ike kewaa refrigerants ụlọ ọrụ mmepụta ihe n'ụdị 5: ihe refrigerants inorganic, freon, refrigerants hydrocarbon juru eju, refrigerants hydrocarbon na-adịghị mma, na friji ngwakọta azeotropic. Dị ka nrụgide na-ekpo ọkụ si dị, a pụrụ kewaa refrigerants chiller n'ime ụdị atọ: okpomọkụ dị elu (obere-nrụgide) refrigerants, ọkara okpomọkụ (ọkara-nrụgide) refrigerants, na obere okpomọkụ (elu-nrụgide). Igwe nju oyi a na-ejikarị eme ihe na chillers ụlọ ọrụ bụ amonia, freon, na hydrocarbons.