BRADY: Well, instead of that familiar blue flame, these infrared gas burners look more like a traditional electric burner. They glow red, and you can hardly even see that there's a flame there.

A cleaner burner, but without a blue flame In the 1980s indoor air quality was in the news, and the CPSC was taking aim at another home appliance that burns fossil fuels: kerosene heaters.

In fact, a blue-colored flame means that the gas is burning efficiently, with minimal harmful emissions, and is mostly considered safe. 3 / 6. Danger signs.

A blue flame on your gas cooker indicates that the gas is burning efficiently and cleanly. This happens when there’s a proper mix of gas and oxygen. A strong, ...