MRCOOL MLP1SS Signature Series Single-Stage Gas Furnace Propane Conversion Kit is a conversion accessory designed to adapt compatible natural gas furnaces for propane operation. It works by replacing and adjusting specific fuel system components to ensure the correct propane flow and proper combustion for safe, efficient heating. https://www.partshnc.com/mrcool-signature-series-propane-conversion-kit-mlp1ss