How to adjust the flame color.....


Old 12-15-12, 12:02 PM
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How to adjust the flame color..... a Lennox Conservator III gas furnace. The flames are almost all orange, with just a little blue coming out of the burner. I believe this indicates that the furnace is running inefficiently. Thanks for viewing this post!
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Old 12-15-12, 12:18 PM
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Orange does not mean the unit is running inefficient.

Some causes for an orange flame:
1. Normally orange is indication of dirt or moisture.
2. Moisture (I saw a cituation in which the home owner had their rugs
shampoo and the moisture in the rugs caiused all the flames to be a bright
orange. Once fresh air was introduce to where the unit is located the
orange started to fade out)Also if the unit is located where they might be a
lot of moisture such as a damp basement etc.
3. You have to much humidity like from an humidifier or a vaporizer.

Yellow indicates a loss of primary air(This means that no air is mixing with the gas before it exits the burner ports and is lit).
Old 12-15-12, 12:21 PM
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There are blue flames. There are orange flames. There are white flames.

Blue flames are usually produced by a bunsen burner design, which supplies primary air along with the main burner gas.

Orange flames are usually caused by dust, rust, dirt or debris being entrained with primary air when it is injected into the burners with gas from the burner orifice.

White flames are atoms of carbon, heated whit hot to the point of being incandescent, like in a candle flame. The carbon atoms burn to CO2 when they strike air, but to carbon monoxide and soot if something interferes with that complete combustion.

Frankly, I wouldn't trust an inexperienced person to distinguish between white and orange flames. And white flames can produce A LOT of carbon monoxide, which can be deadly. I'd have the equipment inspected RIGHT AWAY by a competent repairman.

Are the burners rusty or dirty? Is the furnace burner compartment dusty or dirty? Are steam, dust or dirty contaminating the comustion air supply for the furnace?
Old 12-16-12, 12:13 PM
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thanks for your response. I had just changed the air filter, which was quite dusty. I'll let it run a while longer and see if the color has changed.

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