A vapor control combustion unit is an efficient method of controlling vapors from the handling, storage, or loading of volatile liquid hydrocarbons when recovery of the vapors is not a viable option. It is an alternative to recovery; hydrocarbon vapors may be destroyed in a flare, combustor or incinerator. A combustor is a device that utilizes modified flare technology. A flare is a device that is designed to process hydrocarbon vapors that contain little or no air. Vapor combustors, on the other hand, are designed to safely burn vapor mixtures consisting of hydrocarbons and air. Sometimes this mixture may be within the flammable range of the vapors being destroyed. An incinerator is an enclosed combustion device and has much more sophisticated controls than either the flare or combustor. It is an open type, where the flame is elevated and visible; or as an enclosed type, where the flame is generally near grade level and enclosed in an insulated combustion chamber or stack.