It draws air in through tiny ports near the burner.
Vent free gas log odor.
Vent free gas log will not produce an odor unless the air it takes in has an odor.
If you think the odor could possibly be coming from an airborne odor eliminate what you think is causing the odor and let the air settle for a hour or so and try burning the log set again.
The byproduct of burning mercaptan is sulfur dioxide which smells more like burnt matches mixed with rotten eggs.
A vent free appliance requires room air to operate.
There are many products that will cause the appliance to smell and below are just a few.
Furthermore sulfur dioxide is an irritant to the eyes and respiratory tract in a more concentrated amounts.
After about eight hours the smell should stop.
People worry that this is due to poor air quality in the room due to the lack of ventilation.
When the room air gets mixed with dirty air it can smell like a petroleum based product.
In reality the cause of these odors is airborne contaminants.
Some people who purchase vent free gas logs complain of an odor that occurs while burning the appliance.
According to magic sweep corporation when a newly installed unit first is turned on there will be an odor for approximately four to eight hours if the vent free fireplace has gas logs.
Allow the gas logs to cure.
The burning of gas produces a natural odor of combustion.
Vent free gas log odors.
This time period is called curing and it causes an unavoidable odor.
This is a physical property which cannot be eliminated but can be diluted.
Include other odors produced by impurities in the gas supply and you have the distinct smell ventless logs produce.