Hot oil heat medium process skid system at Burlington, northern British Columbia natural gas processing facility. Heat medium circulation pumps can be packaged with the instrument compressor system for space efficiency in hot oil systems. Heat to medium circulation rates and inlet/outlet temperatures determine selection of single or multiple-pass heater coil arrangements. Hot oil heat medium skid packages have pre-tested piping systems and pre-installed electrical wiring inside the building for reduced field installation costs. Generously sized hot oil surge expansion drums enable increased startup and operation flexibility. Extreme weather conditions in northern Canada require control systems to be housed in a heated, personnel-accessible building. High temperature hot oil, helical coil, heat medium skid mounted system awaiting transport to the field site. Pilot plant operations searching for new design processes for improved heavy oil recovery require a higher temperature hot oil heat medium system temperature. Hot oil heater configurations, size, and heat transfer fluid selection are all part of the design process prior to issue of drawings for approval. High efficiency helical coil heater system en route to a new liquids recovery facility for a major oil company.