The entrance of the museum is illuminated by 4 street gaslights (2 free-standing ones and 2 on brackets), which are copies of the gas lamps seen in old picture postcards of Ljubljana. The museum interior presents the history of the gasworks from 1861 onwards on 17 panels and the plans for the gas network in 1931–1995. Also exhibited are diagrams of the operation of the old gasworks, photographs of the production of town gas and photographs of the hard work undertaken in the gasworks. These are accompanied by photographs of different gas lights and chandeliers, and displays on the use of gas for cooking, washing, drying, ironing, and heating.
The showcases display a concession contract from 1860, a share certificate of the Ljubljana Gasworks from 1863, several pyrometers and explosion meters, gas detectors, and calorimeters. The development of gas meters from their inception to the present is presented in detail. Among the exhibits are interesting pressure regulators used in the town gas system, a belt-driven gas exhaust, and several gas stoves and table cookers, as well as water-heaters and ovens.