A draft inducer blower is a device used in furnaces to transfer gasses through a heat exchanger. The device is powered by a motor driving a wheel assembly. Although the parts are mechanically quite simple, there are various different types draft inducer blowers. The device will have the required carbon dioxide and carbon monoxide levels already preselected for certain temperatures. The blower measures the temperature of the air flow, controlling the flow of ambient air as required. The process helps to maintain a mixed flow at a specific temperature. Draft inducer blowers are a product of government-mandated efficiency standards for furnaces.