Power low-voltage HVAC control systems with the Packard PF24200 20VA Class II Foot Mount Transformer. It's designed to provide reliable 24V output from a 120V line voltage source. Ideal for use in thermostats, relays, and furnace control circuits, this compact transformer supports a wide range of residential and light commercial heating and cooling applications. The Class II design limits output current to meet NEC safety requirements and helps prevent system damage in the event of overload. Featuring a standard foot-mount base and both wire lead and terminal connections, this class 2 transformer installs easily in control panels, air handlers, and furnace cabinets. Mounting holes are spaced 2.756 in. (70 mm.) apart for compatibility with most HVAC equipment. This 20VA foot mount transformer is a direct replacement for Williams Furnace models 24200, PN24200, and PO24200.