The blue flames on gas stoves indicate that everything is working properly, while red and yellow flames can be a sign of insufficient combustion and danger.
When burning carbon, as in gas stoves, the amount of oxygen entering the burner is important—it determines combustion, flame color, and temperature. In all cases when using propane-butane (LPG), except for decorative fireplaces, the flame coming out of the burner of gas appliances MUST BE BLUE.
The color of the flame is determined by the temperature.
| Gas | Color | Temperature |
| LPG (Propane) | Blue | 1,980°C |
| Natural gas (Methane) | Blue | 1,960°C |
| LPG or Natural gas | Yellow | 1,000 °C |
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Temperatures are approximate The blue color indicates complete combustion. |
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With sufficient oxygen there is complete combustion of propane-butane as the temperature is approximately 1,980 °C. For natural gas (methane), the temperature is around 1,960 °C. The yellow gas flame is an indicator of incomplete a combustion and release of emissions of carbon oxide. Yellow flames burn at around 1,000 °C.
Do you remember your lessons in chemistry at school? If you had the opportunity to use a special burner, you would have observed how the color of the flame changes a15> change depending on the amount of oxygen which is supplied. When the amount of oxygen increases and oxygen is present complete combustion occurs and which is indicated by a blue color. The reason is that during complete combustion enough energy is generated to ionize the oxygen in the air around the burner and the oxygen in the air around the burner to ionize the gas molecules in the flame.
Complete combustion:
Gas + Oxygen = Water + Carbon dioxide + Heat
Returning to the experiment with the burner, we can also see a red or yellow flame. The color is due to the heating of very fine soot particles produced in the flame. This type of flame burns only at around 1,000 °C and releases dangerous carbon monoxide.
Proper combustion of propane-butane requires an air-to-gas ratio of approximately 24:1. Natural gas (methane) requires an air-to-gas ratio of approximately 10:1.
Incomplete combustion:
Gas + oxygen = water + carbon dioxide + carbon monoxide + heat
In case of yellow or red flame please contact a specialist!
In case of yellow or red flame please contact a specialist!Remember – whenever you see a yellow or red flame, or a blue flame with a yellow tip, contact a specialist to check the entire system. Consult an expert if you notice yellow-brown soot around the gas stove or smell an unpleasant, pungent odor coming from the appliance.
The listed cases may be attributed to a loss of gas a gas and/or release of carbon monoxide, which is particularly dangerous in appliances in enclosed spaces. Inhalation of carbon monoxide can lead to headaches, dizziness, confusion, convulsions and loss of consciousness.
Always check that the flame is blue and read the instructions for using propane-butane products. Regular inspections of appliances by a specialist are also mandatory.
If you would like to consult our experts about the installation we have provided you with, please do not hesitate to contact us at: 0700 20204.