The G3500B Series was the first Caterpillar CHP system to introduce several technologies: fully electronic control, automated air fuel ratio adjustment, pre-chamber spark plugs, transient richening with turbo bypass, and individual cylinder detonation control. The G3516B CHP system brings versatility, uptime, and low operating cost to your gas compression operation. This model delivers the lowest engine-out emissions in the industry without sacrificing performance. The G3516B CHP system was the first lean burn gas system to be offered as a fully mobile, containerized power plant.