The Carrier AGAGC9PNS01D LP to NG Conversion Kit is a specialized gas conversion assembly designed to convert compatible propane-fueled furnaces to natural gas operation. It works by replacing the appropriate burner orifices and gas valve regulator components to adjust fuel delivery and maintain proper combustion. https://www.partshnc.com/agagc9pns01d-carrier-lp-to-ng-conversion-kit