With the highest electrical efficiency in its power class and long maintenance intervals, the CG170 series offers low owning and operating costs. High-efficiency performance is achieved by establishing precise control of combustion in individual cylinders, a technology that also increases the CHP systems' reliability by balancing the load of each cylinder. Long service intervals reduce maintenance costs; spark plug maintenance at 4,000 hours is among the longest service intervals in the industry for natural gas CHP systems. The maintenance intervals for oil changes and spark plug replacement are designed to occur at the same time, reducing unit downtime.