Lumonessen outdoor burner for the Vesper fireplace, propane (LP), manual ignition: 31,000 BTU min - 38,000 BTU max. Special order. Burners and burner kits are built for a specific appliance and fuel type. Confirm your fireplace or fire pit model, the fuel (natural gas or propane) and any conversion requirements before ordering, and have installation and gas connections handled by a qualified service technician following the manufacturer's instructions. Special order - contact us for a quote.