Trailer Refrigeration Inc. has been one of the leaders in recreational vehicle (RV) Gas Refrigerators Service since 1975. Based in Tucson, Ariz., it is a provider of sales and service of LP gas refrigerators for recreational vehicle (RV) and home use. The firm s core business includes rebuilding and repairing gas refrigerators. Trailer Refrigeration Inc. installs all new tubing in all Dometic and Norcold remanufactured cooling units. It also operates as a factory authorized sales and service center for Norcold and Dometic RV refrigeration.