As a service to our clients, IES offers a recycling program to recover those gases that can be used in-house or those gases for which we have an identified outlet. For the most part, IES accepts propane, refrigerants, inert gases, and calibration gases. Other gases may be accepted upon determination of a valid end user. Typically, gases received by IES are consolidated in larger cylinders; the original cylinders are devalved, punctured, making them safe for disposal as scrap metal. A certificate of recycling is provided.