As technology advances, price often drops while quality improves.

Oklahoma City entrepreneur Ron Peeler hopes that trend will continue in the market for compressed natural gas vehicles and the equipment that fills them with fuel.

Peeler’s HYPRES Equipment adapted its high-pressure breathing air compressors and in 2012 began selling Smart Fill CNG, a natural gas compressor system that can be installed at a home and used to fill a CNG vehicle overnight.

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