Mitsubishi Heavy Industries (MHI) and Toho Gas Co have jointly developed a new 450-kW gas co-generation system. The newly developed gas co-generation system, which is based on a previously introduced 380 kW system, achieves a power output of 450 kW, made possible primarily through optimization of combustion and the adoption of components enabling superior efficiency. Generating efficiency is 42 per cent, the world?s highest level in the 400 kW class, and overall efficiency is a robust 81.5 per cent.Increased merits in terms of both initial costs and running costs were pursued through the elimination of the need for denitrification equipment; together these benefits enable a faster investment return than with the 380 kW system.