Reznor 175265 Transformer is a reliable HVAC power component that converts 120V primary voltage to 24V secondary output with 30VA capacity for control circuits and low-voltage devices. It works by reducing electrical voltage to safely operate thermostats, relays, ignition controls, and automation systems in Reznor heaters, furnaces, and HVAC equipment. https://www.partshnc.com/120v-pri-24v-sec-30va-transfor