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.
Vent free gas log odor.
Rasmussen does not use paint based coloration as the paint can burn away and cause odors which is especially noticeable in vent free sets.
There are many products that will cause the appliance to smell and below are just a few.
This is a physical property which cannot be eliminated but can be diluted.
When the room air gets mixed with dirty air it can smell like a petroleum based product.
It draws air in through tiny ports near the burner.
After about eight hours the smell should stop.
Furthermore sulfur dioxide is an irritant to the eyes and respiratory tract in a more concentrated amounts.
Vent free gas log odors.
The byproduct of burning mercaptan is sulfur dioxide which smells more like burnt matches mixed with rotten eggs.
People worry that this is due to poor air quality in the room due to the lack of ventilation.
In reality the cause of these odors is airborne contaminants.
This time period is called curing and it causes an unavoidable odor.
Rasmussen uses inert ceramic stain mixtures which do not create any odor when burned.
A vent free appliance requires room air to operate.
Include other odors produced by impurities in the gas supply and you have the distinct smell ventless logs produce.
Some people who purchase vent free gas logs complain of an odor that occurs while burning the appliance.
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.
Allow the gas logs to cure.