You may probably be wondering why your gas fireplace logs are turning black after some time. You may also be wondering whether or when you should replace your gas fireplace logs.
The gas fireplace logs turn black because of the soot that accumulates on them after a while. The soot usually comes from the poor combustion process of the fuel that you use on your gas logs. The good news is that you can conveniently clean the soot from your gas fireplace logs and even prevent the soot from forming after.
Is it Normal for Gas Logs to Blacken?
It is perfectly normal for gas logs to blacken after working for some time. The gas logs blacken because of the soot that accumulates on them after some time. The soot comes from the impact of the yellow flames of your gas fireplace on the rough surface of the gas logs.
What Causes Black Soot from the Propane Fireplace?
The black soot on your propane fireplace comes from fuel molecules that fail to burn appropriately during the combustion process. Poor combustion occurs when the mixture of air and propane fuel is not perfect. Thus, the unburnt molecules accumulate on the surface of your fireplace as black soot.
Do Gas Fireplace Logs need to be Replaced?
It would be best if you replaced your gas fireplace logs as soon as their color begins to fade. The fading of the color may occur after about three years. Ceramic gas fireplace logs are usually highly durable and can take a long time before the color begins to fade.
What are the Dangers of Gas Logs Turning Black?
One of the dangers of the gas logs turning black is that the burner ports may be clogged. The burner ports are small apertures that allow your gas fireplace to generate a flame. If the logs turn black, it means that there is a lot of soot that is accumulating inside the fireplace. The soot may clog the ports and prevent the fireplace from generating a flame.
Another risk of the logs turning black relates to the aesthetic value of the gas fireplace logs. Blackened gas fireplace logs interfere with the look of the flame on your gas fireplace. In addition, the logs lose their visual appeal when they are covered with a layer of soot.
Reasons Why your Gas Logs are Turning Black
Your gas logs are turning black because of the accumulation of soot. The soot may accumulate either on the surface or inside the small cracks on your gas logs. The soot arises from the inefficient burning of the gas fuel on your fireplace.
This may result from the burner ports clogged with dirt or even small amounts of soot. In other cases, the soot in your gas fireplace may arise from how the gas logs are arranged.
If the gas logs are not properly arranged, the flame may not burn as it is supposed to. In addition, obstruction of the flame and airflow in your gas fireplace may lead to soot production.
Why you have Gas Fireplace with Black Soot on the Mantle
The leading cause of black soot on the mantle of your gas fireplace is poorly arranged logs. You need to arrange the logs properly for the flame to burn appropriately and prevent soot accumulation.
Unfortunately, it is common to fail to arrange the logs properly after cleaning them. It is always good to consult the manufacturer’s instructions when rearranging the logs inside the gas fireplace.
Inappropriate arrangement of the logs obstructs airflow inside the gas fireplace. The obstructions result in incomplete combustion of the gas fuel that burns inside your fireplace. This process leads to soot buildup in the fireplace, especially on the mantle.
Why you have Gas Fireplace Soot on Walls
Soot occurs on the walls of your house as an effect of the flames. If the gas fuel combustion is not complete, the unburnt carbon particles are emitted in the form of soot. The small soot particles rise with the warm air from the fireplace’s flames.
The soot may then be deposited on the sides of the fireplace and other places in the room, including the ceiling, the mantle, and the walls. A good percentage of the soot is deposited on the surface of the logs.
The deposition of soot on the surface of the logs gives them a black look. The soot deposited on the sides of the fireplace also makes them blacken. You can remove the soot from the sides of the fireplace by cleaning it using either a damp cloth or a brush.
Why you have Soot on the Ceiling from Gas Fireplace
You can have soot from your gas fireplace on your ceiling if it rises with the warm air and settles on the surface. Soot from your gas fireplace rises with the warm air from the heating device. If there is a large amount of soot from the fireplace, it will be deposited on the ceiling.
The soot deposition on the ceiling will become evident when the color of the ceiling begins to change. You can remove the soot from your ceiling by cleaning it using a brush or a dry rug.
How do you Fix Black Soot on a Gas Fireplace?
You can fix black soot on a gas fireplace by restoring the air-fuel ratio. Any good technician can help you achieve this by carefully cleaning out the air intake shutters. Cleaning the shutters helps to deal with the soot that accumulates on your gas logs after a while and gives them the black color.
How to Stop Soot
The most effective way of stopping the soot from your gas fireplace is to have a technician check and fix the air intake shutters. When these small components of your gas fireplace are not functioning correctly, the gas fireplace ends up emitting lots of soot.
A technician can clean these shutters to ensure enough air gets through your gas fireplace. Having enough air going through your gas fireplace is essential for maintaining the air to fuel ratio. When this ratio is ideal, the gas burns neatly without producing soot.
How to Clean Soot from Gas Logs
One benefit of having a gas fireplace is cleaning it fast and efficiently. Here is a simple procedure that you can use to clean the soot from the gas logs of your fireplace.
Switch off your gas fireplace
This should be the first step of cleaning the soot off your gas fireplace logs. Ensure that you turn off the gas fireplace before cleaning it. Remember to let the gas fireplace cool off entirely before you open it. The gas fireplace may take several minutes to cool off completely.
Remove the logs from the fireplace
The next step of the cleaning process is to remove the logs from the fireplace. Lay the logs on an old piece of cloth or newspaper. Remember to remove the logs very carefully from the fireplace.
Remove the soot from the surface and cracks of the logs
You can use either simple nylon or a vacuum cleaner to remove the soot from the surface of the logs. A brush is ideal because its bristles can access the soot that usually hides in the small cracks found on your logs’ surface.
Therefore, you do not have to dip your brush in water when cleaning the soot off the surface of the gas fireplace logs. In addition, you do not need to use chemicals when cleaning the logs. Using harsh chemicals can easily discolor your gas fireplace logs.
Return the logs inside the gas fireplace
Once you have cleaned the surface with either a brush, a damp cloth, or a vacuum cleaner, return them to the fireplace. You can refer to the manufacturer’s instructions when relaying the gas fireplace logs inside the fireplace.
You may also clean the inside of your fireplace if it is necessary. You can do this by using the vacuum cleaner to remove all the dirt that may have accumulated on the inside surface of your gas fireplace.
Conclusion
It is usual for soot to accumulate on the surfaces of your gas fireplace logs. Your gas fireplace produces a lot of soot when the air to fuel ratio is not attained. In addition, the soot may arise from poor airflow because of the inappropriate arrangement of the gas logs.
The good news is that you can clean the soot from your gas fireplace logs quickly. There is no need to use a lot of water to clean the soot off your gas fireplace logs. A simple brush or a damp cloth is enough for cleaning the soot.
Alternatively, you can vacuum-clean your logs to remove all the tiny soot particles that may be embedded in the cracks found on the surface of your gas fireplace logs.
FAQs
The main reason why your gas logs are turning black is due to a buildup of soot on the logs, which can be due to the fuel in the fireplace not burning properly or even a lack of ventilation inside of the fireplace.
Why are my fire logs turning black? ›
Soot buildup is commonly caused by clogged burner ports and improperly positioned fire-logs. A fire-log that's out of position can obstruct the flame path that ensures the clean-burning of gas. This contributes to soot formation on the fireplace. Another primary cause of soot is clogged gas burner ports.
How do I stop black soot from my gas fireplace? ›
Over time, air intake shutters often become clogged with things like pet hair, dirt, lint, and other household debris. A technician can often reduce soot levels simply by cleaning out the air intake shutters and restoring the air-fuel ratio.
How do you get black off gas logs? ›
Use a damp rag or lint-free cloth to wipe off the soot, carbon, and dust from the logs, at least once per year. Be careful to avoid scratching the logs, or they will no longer be useable. Liquid gas log cleaners are also available at your local fireplace dealer and may make it easier to clean.
How do you restore a black fireplace? ›
If your grate's looking a little dull, use a commercial iron paste or grate polish to restore its blackness. This is usually applied, left for a few hours and then polished with a cloth, but follow the manufacturer's instructions.
Do gas fireplace logs go bad? ›
Q: How long do gas logs last? A: In the average home, a well-maintained vented log set with ceramic logs will last 10 or more years. A well-maintained vent-free log set with ceramic logs can also last a long time, but, if heavily used, will begin to wear in 3-5 years.
What maintenance does a gas fireplace need? ›
The initial and foremost guideline of any gas fireplace system is to have it inspected every year. With professional chimney companies, you can usually have your annual chimney cleaning and gas inspection scheduled at the same time. Matter of fact, your whole system should be inspected annually, top to bottom.
Is black soot harmful? ›
So, to answer your question, yes, black soot can be dangerous and even fatal to some people. Essentially, soot gets into the human body through ingestion, inhalation, or through the skin and eye. When in the body, soot particles can cause coronary heart disease, breathing issues, including asthma, and even cancer.
What is the best cleaner for black soot? ›
Regular white vinegar is one of the most versatile cleaners. Not only will it break down oily soot stains, but it can even remove set-in nicotine stains. Mix one part warm water to three parts vinegar, then wipe gently with a soft sponge or microfiber cloth to remove soot from walls, ceilings, or woodwork.
Should you clean gas logs? ›
You should take the time to clean your gas fire logs once a year. Even when you're not using the fireplace, the accumulation of dust and debris can pose a problem. Cleaning the logs will allow you to use your fireplace more safely and give you a chance to inspect for damage that needs to be repaired.
Soot on vented gas logs is nothing to worry about. It is a natural occurrence when the yellowish flames of a gas log impinge on a rough surface. Some people like the look, some don't. If you don't, we suggest that you VERY CAREFULLY take the logs outside and brush the soot off with a whisk broom.
How often do gas logs need to be cleaned? ›
Even though gas fireplaces do not burn wood or make smoke, cleaning a gas fireplace monthly is essential, even when it is not being used. Regular cleaning will prevent dust and dirt from harming mechanisms and allow you to inspect the system for damage.
How do you know when gas logs are bad? ›
If you notice a lot of residue built up before you start your propane gas fireplace up for the season, you may want to replace your propane gas logs at that time, as this could indicate excessive breaking down of the logs.
Why is my fireplace mantel turning black? ›
A black soot stain is warning you that something is off and the chimney system is not functioning properly. For example, if any smoke residue appears on your fireplaces mantle, then take it as a serious warning to have your fireplace inspected.
What is the black build up in my fireplace? ›
Creosote is a black, tar-like substance that forms inside your chimney when smoke doesn't entirely escape. As it builds up, creosote can cause chimney fires, which can then lead to house fires. Luckily, a professional chimney sweep can help resolve the issue.
What can I do with a black fireplace? ›
Combine a black fireplace with an otherwise neutral and off-white décor to create some drama. Or pair it with green walls to make a more muted and moody vibe. A black fireplace will also work with a more traditional shiplap that can help bring some country and farmhouse charm into your space.
What is the air shutter on a gas fireplace? ›
An air shutter is a metal collar that regulates how much oxygen is mixed with the gas flowing to your burner. It is a very needed tool because fireplaces rely on air for combustion to operate. The amount of air and fuel that needs to be mixed for operation is determined by the manufacturer before shipping.
What should flame look like on gas fireplace? ›
A healthy, properly burning flame on gas appliances should be blue in color, sometimes with a tiny tip of yellow, with a little light blue triangle at the center. This blue color flame indicates that there is safe, efficient and more complete fuel combustion.
Should fireplace air intake be open or closed? ›
When burning your fireplace, the outside air kit lever should always be in the open (or up) position. The outside air kit is designed to provide additional air for combustion.
Do gas log fireplaces need to be cleaned? ›
Much like other types of fireplaces, a gas fireplace requires regular maintenance to remove byproducts and keep it running safely. If you don't regularly clean a gas fireplace, you could be faced with hazardous gas leaks that can cause carbon monoxide poisoning and dangerous creosote buildup.
The cost to replace gas logs varies depending on the size, material, and brand. Typically, log sets can cost anywhere from just over $100 to over $1000. The average sets cost somewhere in the $400-$700 range.
What is the average lifespan of a gas fireplace? ›
How Long Can a Gas Fireplace Last? Generally speaking, you can get a good ten to fifteen years of use before you need to replace your gas fireplace.
Is it OK to run gas fireplace all day? ›
You can run a vented gas fireplace all day with little concern for anything other than gas usage.
Should you leave the pilot on a gas fireplace? ›
We recommend that you turn off your gas fireplace pilot light seasonally. Turning off your gas fireplace's pilot light can save a substantial amount of energy and money. It is important to remember that not all gas fireplaces have “standing” pilot light, or, a pilot light that is “always on”.
How often does a gas fireplace need to be serviced? ›
Knowing when to get your gas fireplace serviced depends on how much you use your unit. If you find yourself lighting a fire often throughout the cold season, consider servicing your unit once a year. If you rarely use your fireplace, you may be able to service it once every 2 years.
What does black soot indicate? ›
What is Black Soot? Black soot, sometimes mistaken for mold, is a black substance or residue that's left behind after fuel is burned. It can come from common household items like candles and is an air pollutant that can cause health problems if it isn't addressed.
What 3 problems does soot cause? ›
The small size of particulate matter allows it to easily enter the lungs and bloodstream. This can cause serious effects including heart attacks, bronchitis, aggravated asthma, strokes, and even premature death. There are several harmful environmental side effects associated with soot.
Does black soot mean carbon monoxide? ›
Furnaces can produce carbon monoxide, which then leaks into your house. Carbon monoxide can leave a sooty residue and turn your furnace filter black. Carbon monoxide is extremely dangerous in high concentrations. If carbon monoxide levels are high, it could be a problem with your furnace.
Does Dawn dish soap remove soot? ›
For soot-covered or tarnished tools, simply wipe down your fireplace tools and accessories with a water and Dawn® Platinum solution. This can help remove grime and soot; regularly wiping down your tools can help prevent the need for heavy scrubbing.
Why am I getting black soot in my house? ›
Soot comes from incomplete combustion of a carbon-based material. Any material that can burn can produce soot, including natural gas, LP, wood, oil, candle wax, gasoline, diesel fuel, tobacco smoke, dust, dirt, cooking oils, and carpet fibers.
Trisodium phosphate (TSP) is regarded as the best product for removing soot.
Does Magic Eraser work on soot? ›
🤩A Magic Eraser (or its generic equivalent) is a great. way to remove soot stains from hard surfaces like. cabinets, ceilings, and walls.
What is the best soot remover for fireplace? ›
Cream of tartar is a pretty effective cleaner for soot stains, but if you don't have any on hand, soap and white vinegar work too. This method works great for stove fireplaces and new brick. However, don't use this method on old brick; it's too acidic.
What are some home remedies for removing soot? ›
Try using an oven cleaner or Windex with Ammonia mixed with water. Apply the mixture liberally to all surfaces before wiping clean with a damp cloth. This method should remove any lingering soot and leave your floors looking brand new! Note: avoid using vinegar, as this can leave stains and damage your wood surfaces.
Is it OK to leave gas logs on all night? ›
It's not safe to leave it on. Why Isn't It Safe? The biggest reason is that gas fireplaces can release deadly carbon monoxide gas, which is odourless and can go unnoticed until a person dies from carbon monoxide poisoning. It is best to not leave your fireplace on for more than three hours at a time.
How long is it safe to run gas logs? ›
Even if your gas fireplace is sealed and vented to release fumes into the outside, it's better to lean towards the safer side of things and only leave it running for two to three hours at a time.
How long can you leave gas logs on? ›
If you own a fireplace that is fully-vented and equipped with a sealed glass front, this type of unit can operate continuously. On the flip side, if your fireplace unit is vent-free and equipped with front doors that can open – this unit should only operate for a maximum of three hours at a time.
What color should gas logs be? ›
A healthy gas flame will burn steadily with a yellow or orange. If the flame is not yellow or orange it may be a sign that your gas fireplace needs adjusting or cleaning, which should be done by a qualified technician, such as those we have at Kozy Heat.
Should gas logs turn black? ›
Soot build-up on vented gas logs is a normal part of the combustion process, and usually adds to the realism of your log set. Natural gas log sets generally produce less soot than liquid propane log sets.
Why are my gas logs getting soot on them? ›
Soot buildup is commonly caused by clogged burner ports and improperly positioned fire-logs. A fire-log that's out of position can obstruct the flame path that ensures the clean-burning of gas. This contributes to soot formation on the fireplace. Another primary cause of soot is clogged gas burner ports.
The two main reasons for soot buildup are inappropriately positioned fire logs and clogged burner ports. A misaligned fire log might hinder the flame path, preventing clean gas combustion. This leads to the production of soot on the hearth. Clogged gas burner ports are another major source of soot.
How do you maintain gas logs? ›
Use a damp rag or lint-free cloth to wipe off the soot, carbon, and dust from the logs, at least once per year. Be careful to avoid scratching the logs, or they will no longer be useable. Liquid gas log cleaners are also available at your local fireplace dealer and may make it easier to clean.
How do I know if my gas fireplace needs to be replaced? ›
Does Your Fireplace Need Replacing – Here Are The Telltale Signs
- Your Fireplace isn't Heating Your Home Like it Used to. ...
- Your Fireplace is Too Old. ...
- You Notice a Constant Burning Smell or the Smell of Sulfur. ...
- You Notice White Stains on Your Chimney or Fireplace. ...
- You Keep Having to Call People Over to Do Maintenance.
Logs go black due to mould and mildew, frequently found on firewood, are the black substance. Typically, well-maintained firewood has more shades of brown, tan, and grey. If it's black, it was most likely left exposed while stored in the woods.
How long should gas fireplace logs last? ›
Q: How long do gas logs last? A: In the average home, a well-maintained vented log set with ceramic logs will last 10 or more years. A well-maintained vent-free log set with ceramic logs can also last a long time, but, if heavily used, will begin to wear in 3-5 years.
Why are my logs so smokey? ›
A common cause of this is that you are burning the wrong fuel. When it comes to firewood, you should only ever use fuel with a moisture content of 20% or less. This is because wood with a high moisture content creates more smoke as it burns away the water still inside.
Can gas logs catch on fire? ›
Not only does this emphasize the need for carbon monoxide and smoke detectors, but it should also serve as a warning that gas fireplaces should be monitored carefully. Accidental fires can also occur should you leave an unvented or improperly sealed gas fireplace running for too long—and without watching it.
What causes black soot from propane fireplace? ›
When you burn propane, water vapor and carbon dioxide are produced. These molecules are colorless and they cannot be seen by the naked eye. Propane that is burned straight without incorporating oxygen into the process will emit black smoke which leaves soot behind on your outdoor fire feature.
Is it OK to leave the pilot light on in a gas fireplace? ›
The answer is yes in almost all cases. A gas fireplace pilot light produces a flame from a small trickle of gas and does almost nothing else. This small flame is not enough to pose a threat, and the trickle of gas is immediately burned up, so it doesn't hurt anything either.
Is it OK to leave gas fireplace on all the time? ›
It's not safe to leave it on. Why Isn't It Safe? The biggest reason is that gas fireplaces can release deadly carbon monoxide gas, which is odourless and can go unnoticed until a person dies from carbon monoxide poisoning. It is best to not leave your fireplace on for more than three hours at a time.
