Asked by: Atilano Zaslavets
asked in category: General Last Updated: 15th June, 2020

Why do my gas logs smell?

The most common rotten smelling additive is Methyl Mercaptan. The byproduct of burning Mercaptan is Sulfur Dioxide, which smells more like burnt matches mixed with rotten eggs. Include other odors produced by impurities in the gas supply and you have the distinct smell ventless logs produce.

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Just so, is it normal for gas fireplace to smell?

No, it is not normal for a gas fireplace to give off a strong smell for this long of a time. The strong "urine" smell could be urethane insulation that is too close to the firebox or vent pipe. Or if you are running on natural gas, it could be the mercaptan odorant in the gas which is leaking.

Likewise, are fumes from gas fireplace harmful? Gas fireplaces are generally considered cleaner than traditional wood-burning fireplaces, but they can also pollute indoor air quality if not properly vented. Toxic gasses emitted include deadly carbon monoxide and nitrogen dioxide -- a gas particularly harmful to those with asthma.

Additionally, why do my gas logs smell like kerosene?

When burned, methyl mercaptan has an odor similar to burnt matches and rotten eggs. When vent-less logs burn in a fireplace, natural gas additives burn along with the gas. As a result of this combination, fireplaces will emit a kerosene odor when burning within a vent-less environment.

Is it normal to smell gas after pilot?

If you think you smell gas and you have gas utilities, be safe. Note that it is totally normal on automatic pilots (pilots that do NOT stay lit all the time) to smell a little natural gas when the are first turned on. A little gas will escape as the pilot and burners light on your heat or appliance.

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