For gas-fired burner systems, Nautilair 7.6 in. blowers incorporate brushless dc motors for reliable performance in excess of 20,000 hr with minimal maintenance. These premix burner blowers deliver measured air/fuel mixture to optimize combustion as well as reduce N₂O and CO emissions. Speed can be adjusted internally via onboard potentiometer or external PWM or dc control that actively varies blower performance, and onboard IntelliGen controller electronics integrate DSP.