replying to Chris, Benjamin Karazi wrote: Hello, You have the best kind of fire anyone could have; a flame saturated with oxygen and no killer monoxide in any form. Your system must have a valve or a hole inline the when gas is running, it causes a vacuum condition and sucks the air (oxygen) in and mixes it with the gas. If you wish to have a yellow, orange, red, or combination of colors, should close that valve. If you are not familiar with the physic subject or are not technical, may add copper, stainless steel, on the flame to cover the fire from proper breathing and place some safe fireproof stones or rocks on top of the metal/s. Also, purr some Glowing Embers, Lava Rock Pellet, and Vermiculite. A tip to saving money on gas and have more heat in your fireplace: place a carbon monoxide detector in front of your fireplace (on position) and slowly start closing the exhaust damper (not all the way). The point that the detector goes off, slowly start reopening the damper and keep resting the detector to the point that the damper is as close as possible without releasing carbon monoxide into your leaving area (detector does not go off). Note that with the blue flame, you can close the damper all the way, where it is like you are using your stove!