The Trane BAYLPKT210B Natural-LP Gas Conversion Kit is an OEM accessory designed to convert compatible HVAC furnaces from natural gas to liquid propane operation. It includes calibrated components such as orifices and regulators that adjust fuel flow and air-to-fuel ratio for safe combustion. The kit works by replacing existing natural gas parts, allowing the furnace to operate efficiently on propane. Commonly used in residential and light commercial gas furnaces, it offers flexibility in fuel selection. Benefits include reliable performance, safe combustion control, improved efficiency, and convenient adaptation to propane-based heating systems.