The MRCOOL MLP1SH Signature Series High Altitude Single Stage Gas Furnace Propane Conversion Kit is designed to convert compatible MRCOOL Signature Series single-stage gas furnaces for propane operation at high altitudes. The kit modifies the furnace’s fuel delivery system to support proper propane combustion and efficient heating performance in elevated locations. Intended for compat... https://www.partshnc.com/mrcool-high-altitude-propane-conversion-kit-mlp1sh