Gas fireplace smells like propane. Like most household appliances gas fireplaces can run into their share of problems over the years. Include other odors produced by impurities in the gas supply and you have the distinct smell ventless logs produce. When natural gas does not burn off completely a fireplace will emit kerosene odors as a byproduct.
I have an exterior vented propane fireplace in a new home my wife and i bought. Are you concerned about the odor being emitted from your gas fireplace. Natural gas impurities in its purest form natural gas has no odor as a gas or when burned.
Previous owners converted this to a gas fireplace but took their logs when they moved. It puts out a dinky little flame and within minutes the whole house smells like propane and i have to open the windows to air it out. The byproduct of burning mercaptan is sulfur dioxide which smells more like burnt matches mixed with rotten eggs.
Watch the video to learn about what causes these odors and effective tips for getting rid of them.