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About Us

Need Answers For Your Fleet?

innovative engineering

The IEP engineering team have literally turned space “constraints” into space “opportunities”.  Where competitive air conditioning or auxiliary power units will simply not fit, IEP products fit on virtually every locomotive.

exceptional service

Whether by a telephone call, email or even virtual installation assistance, the IEP stands at the ready to service your needs.  We understand the need for a timely response.

creative solutions

Both the IEP air conditioning and auxiliary power solutions work in harmony with the locomotive’s 72 volt power system rather than fight with it.

impressive results

APU fuel savings in the tens of thousands of dollars per year and improved air quality.  Reliable air conditioned crew comfort that is second to none.

Tomorrow's
Solutions Today!

An integral member company of INPS Group Inc., INPS Environmental Products Inc. (IEP), enhances the decades of rail industry presence of the INPS Group of companies with real-world rail and industrial experience.

Responsible for the first patented locomotive auxiliary power unit (APU), the IEP team also developed the methodology to earn emissions reduction credits from a mobile source. The first of its kind in North America.

Drawing upon the experience of providing heating, air conditioning, and other thermo-dynamic solutions to the construction, military and transport truck industry, including the production of thousands of locomotive APU’s and tens of thousands of truck APU’s, the IEP team, through constant research and development remains committed to the enhancement, refinement and perfection of its locomotive idle reduction, fuel savings and air conditioning technologies.