To change propane fireplaces to natural gas requires that you purchase a conversion kit from the company that manufactured your fireplace.
Can you convert a propane fireplace to natural gas.
A natural gas fireplace provides similar output to propane units.
These include converting the unit to use gas logs using a gas fireplace insert which also makes the fireplace much more efficient or converting the fireplace to a vent free appliance.
Converting a propane gas log to one that operates on natural gas can be accomplished with a suitable conversion kit.
No you cannot run your propane generator on natural gas.
A wood burning prefabricated fireplace will need a conversion kit but masonry fireplaces have several options.
Conversion involves replacing the propane regulators and orifices in the appliance with ones designed for natural gas.
Converting appliances the density difference between propane and natural gas means that propane gas appliances such as furnaces and ranges must be converted to handle the lighter natural gas.
The kit comes with fittings and the flow regulator parts gaskets and compression springs you will need to modify the fireplace regulator unit.
Select a kit that works specifically with gas logs to ensure you obtain the correct fittings and the regulator you need to make the conversion.
The generator you bought has been designed for propane gas not for natural gas.
However all the log sets they sell can come configured as either propane or natural gas and my research indicates that all i have to do to convert it is to replace the regulator and the orifices with ones designed for natural gas.