I want to pass information along, to help people solve problems.". Black soot from propane furnace. Black soot is on the walls, ceilings, and appliances in the kitchen. I have received a deluge of questions on this dust-and-soot invasion. There are flakes of soot that have floated around and landed in a box. Gas fireplaces and gas fireplace inserts let you enjoy the look and feel of a wood-burning fireplace without the work and mess. The danger of carbon monoxide poisoning is the primary issue when dealing with furnace soot in the air. Ask Your Own HVAC Question. - Replace cleanout plates left off or failed. To determine where the failure is: look for the 2 small holes as seen on the left. Hunker may earn compensation through affiliate links in this story. TOM: Mm-hmm. Or the same problem with your air conditioner, or whatever system you own. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. TOM: Huh. call for black soot in house every were puff back .appaired to be soot through out the house .just started after 10 years of living in house . It's from the dust in your air and will probably be there again this year. Submitted: 3 days ago. Michael Ferryman. Improper burning is the cause of black smoke coming from a boiler. Currently my hubby has a dry cough and I'm convinced the mould is a factor. The air filter is an important component of your home’s heating system. While soot on your walls and other surfaces is unsightly, the health risks it poses are far more serious. For example, a blocked chimney may make your furnace smell like it's smoking, while a pest struck in the system would smell like decay. This dirt sticks to your ceiling and onto your ceiling fans because there are particles in the air (even if you can't see them with the naked eye) that crash together and accumulate onto various surfaces. What is that means? A furnace warms your home by distributing heated air through a series of ducts or pipes. The best way to prevent this black soot from circulating into your home is … Why would my furnace filter be black? If so, you have a serious problem that needs fixing. Seeing debris, soot or rust flakes in the flue vent connector or on the horizontal surfaces near the furnace is a sign that it needs any of the following: cleaning and servicing, … Soot consists of bits of uncombusted carbon released from the natural gas. That can happen, but it is not always the cause of a problem. It may be direct discharge of soot. So, make sure that the flame of your oil or gas burner is adjusted to the fullest efficiency and there is adequate air for the burner. Category: HVAC. 2. The following are a few reasons this may be happening in your home. The most common cause of soot accumulation in the home, aside from an open fireplace, remains scented wax candles, according to expert home inspector Jim Rooney. Check the cleanout plates of a hot air furnace. This is not always adequate, said Certuse, who suggested an engineered installation. That may be a big order, but Certuse feels that if all this is done, the stains will be history. Excessive soot also poses a fire hazard and increases the risk of carbon monoxide poisoning. Particles are blocked and go back whence they came. Moderators: Greg, Mark. Soot buildup is not normal for an oil furnace. Soot smell means there’s a big problem. On 2017-02-19 17:33:26.599374 by (mod) - Nick After cleaning a sooted oil fired boiler it's normal for a bit of loose soot and debris to blow out of the flue at the next one or two firings. There are instances where a filter can turn black, and you’ll need expert help in taking care of the problem. - A down-sloping smokepipe drains soot down the vent hood on a gas appliance (the bell-like hood on the pipe), bringing soot into the basement. August 27, 2018. Why Is My Furnace Filter Black? Does the smoke smell like soot? Then it gets into the supply ducts. Soot inside the furnace should still be removed every year or twice a year if there’s more than half an inch of material accumulating per year. - Check for gasket failure between cast-iron boiler sections. So, said Certuse, check your boiler's aquastat to make sure it is working well. The combustion air, which could contain soot, never mixes with the air in your house unless the heat exchanger is compromised or it leaks out of the flue pipe. Black soot keeps coming around my furnace filter should I be worried or does the furnace just need cleaning. However i have an additional possible reply. Manufacturers of power vents have a device called a heat recovery ventilator, which brings air into the house when the heat is on to counteract the negative pressure, so there is no infiltration. For those who suspect the furnace you should have a carbon monoxide detector within the dwelling. In the return or in the room vents? However, excessive soot buildup can indicate that your furnace is not running at peak efficiency. Using low-grade fuel oil boilers also produces more soot than high-quality fuel. DSC_0674.JPG DSC_0674.JPG. When natural gas combusts under perfect circumstances, it produces virtually no soot at all. The emissions coming from the chimney also seem darker. Low grade fuels create more soot when burned, especially if you have an oil furnace, and you may be able to reduce your furnace's soot production simply by using a higher grade of fuel. From time to time furnaces do need to be cleaned, but soot buildup is usually not a problem. When you run your air conditioner, the evaporator coil will become damp from condensation. Check around the furnace's flue pipe or vent pipe for signs of the black dust on the ground and lining the walls of the pipe. In any case that your air filter turns black, you should know all the things you must. - Reversal of particle flow caused by a dirty appliance or burner. When dust gets into the furnace and is blown across the heat exchanger, it can carbonize and turn black. Or the same problem with your air conditioner, or whatever system you own. Thick soot deposits can interfere with the heat exchange between the furnace … When dust gets into the furnace and is blown across the heat exchanger, it can carbonize and turn black. Having a fireplace in your home is something that most people find cozy. The company does cause-of-loss investigation on heating systems, generally for insurance companies. Soot is formed in a temperature lower than 284 degrees. Now for the products of combustion, particles created by burning fuel. If there is no soot … Soot Prevention and Maintenance Dirty insulation is a sure sign of this. It may be just when it's cold for the first while, but it seems like it's constant. It happens every year. So if you’re seeing black particles coming out of your air conditioner vents and you’re a fan of burning candles or your fireplace, the most likely culprit is soot. DAN: It’s coming out of the vent. When natural gas combusts under perfect circumstances, it produces virtually no soot at all. Two or three candles, not 10 or 20, will do nicely for romance and the holidays. So is cooking with oil. Make sure the electricity and gas, if involved, are … I don't see smoke coming out of anyone else's chimney. If so, you have a serious problem that needs fixing. "People tell me they had a puffback from their burner," Certuse said. I recently had my air ducts cleaned in my 17 year old townhouse Once cleaned my filters are turning black and I am noticing soot everywhere I have had the company come back and they cannot find the source of the soot What do I do . When any fuel is ignited, gases containing tiny particles of solid matter escape. Does the smoke smell like soot? When a furnace produces soot, it is everywhere, not just at the register. Why Does My Gas Fireplace Have Soot? In that case not only is soot being produced but so are exhaust fumes, which are a hazard to your health and need immediate attention. I ask my landlord to do this part because he would nor reimburse any of my $200.00. Although the problem may be as minor as a filthy system component, black smoke may point to a more serious problem that requires replacing failing system … The furnace blower may be pulling smoke and soot thru and past the filter ,sending it thru the duct work and into your living space. From using it for warmth to just as an ascetic piece, it’s a great addition to any home. The air filter is an important component of your home’s heating system. Soot is the inevitable result of burning fossil fuels, and boilers that run on gas or oil produce soot simply by doing their job. If it does, Its soot and you need to investigate your furnace area. 4 reasons a soot smell is bad news: 1) Soot is the result of incomplete combustion, meaning that your furnace isn’t burning the gas properly or efficiently. See if there is soot on the floor around the stack pipe or in front of the furnace. If the air in your home contains a high concentration of soot, its tiny particles can get deep into your lungs and cause inflammation. Yes, but how does that outside air get contaminated? Well, a black air filter is an indication that something is not right in your furnace. When a furnace produces soot, it is everywhere, not just at the register. Sometimes a power vent (a burner or stove vent that does not need a chimney) that goes through the wall will contaminate the air, which is then drawn into the attic through the soffit vents. A cure that the homeowner can do is to keep the fins (copper squares that fit on the heat pipe to boost heat flow) clean with a vacuum, being careful not to bend the fins. These gases are produced when hot particles meet cooler air, resulting in condensation. Rachel Lovejoy has been writing professionally since 1990 and currently writes a weekly column entitled "From the Urban Wilderness" for the Journal Tribune in Biddeford, Maine, as well as short novellas for Amazon Kindle. If the outside air is clean, there is no problem. If it is not, replace it. Large amounts of soot can be caused by a dirty, clogged or malfunctioning burner, inadequate draft or a low air-to-fuel ratio. 2 posts • Page 1 of 1. archive Posts: 1054 Joined: Sun Feb 18, 2007 9:24 pm. I know this because because my landlord would not have it cleaned and I paid $200.00 to get the coils cleaned and they were really bad.. Carbon monoxide can also be released in this fashion, which is highly toxic. But if the outside air is contaminated, that contamination will get into the house. Most things involving heating systems are best done by an appliance (furnace, boiler, or burner) serviceman, not by the homeowner. Both natural gas and oil produce soot, so we are talking about both, said Certuse. I pulled the cover off where the burner is. Then it gets into the supply ducts. Many times dust and debris can be coming into your home from the attic through the ductwork. There is black soot around furnace. Certuse is director of engineering for his company, Industrial Services & Engineering Inc. of Attleboro, Mass. Breathing sooty air for long periods of time can jeopardize your respiratory system and damage blood vessels, according to the Environmental Defense Fund. I pulled the cover off where the burner is. Answered in 5 minutes by: 11/11/2010. Thanks to gravity, all debris eventually settles (assuming there's no wind, stack air, or forced air to keep it airborne). Post Wed Feb 21, 2007 5:48 am. Soot smell means there’s a big problem. The appliances are doing what they are supposed to do, but there's still soot and dirt. An overly rich fuel mixture sometimes leads to black soot in the tailpipe. All combustible fuels emit carbon monoxide, a problem made worse if your furnace isn't operating properly and is dumping more of this substance into the air you breathe than it should. Will filters help? Experience: Operating Engineer at NRG Energy. Air filters are designed to block dirt and debris and prevent these elements from interfering with your furnace. Air filters are designed to block dirt and debris and prevent these elements from interfering with your furnace. There is black soot around furnace. This can cause combustion byproducts like soot to mix with the air in the house. Why does my furnace filter get dirty so fast? Take a clean, white cloth and rub it on the ceramic gas logs in the fireplace and on fireplace doors, if you have them. Call a professional if you suspect there’s a problem with your furnace, before it becomes a bigger one. Intermittent flame failure shut down. According to the New Jersey Chimney Sweep Guild, inhaling the substance may cause flu-like symptoms while exposure to high concentrations or prolonged exposure to lower concentrations may cause permanent damage or even death. Michael Ferryman. So, this is coming – you say, it’s – is it coming out of the vent for the – through the wall heater? Is this just from skipping one year of having the furnace cleaned, or is there possibily something more serious going on with our furnace? Hi My name … Share this conversation. First, check the appliance. Why Soot and Mortar is Falling Down Your Chimney. That’s not good. Anything that compromises this airtightness can cause soot to discharge where it is not supposed to. Since they exist in the air inside your home, they are virtually invisible until they start collecting on walls and other surfaces in the form of black soot. The presence of black dust around your furnace or coming out of the vents can indicate one of a few problems that range from minor to potentially fatal. Black soot in or on a tailpipe means that the air-fuel mixture that drives the engine is not burning completely. Ask Your Own HVAC Question. When I did, there was a large amount of soot that came out and landed on the ground. When a wax candle or wood in your fireplace burns, it produces tiny black soot particles. If, however, there is a problem with the air-to-fuel ratio the furnace can produce more than the usual amount of soot. Share this conversation. I've noticed when I clean the house there's black particles. I have allergy problems too. In fact, the soot is oozing out of attic vents, through attic hatchway doors, and into and out of vents. Category: HVAC. Category: HVAC. Well, a black air filter is an indication that something is not right in your furnace. Take an engineer's word for it. Soot build-up, also called “black soot deposition”, is most likely the reason behind a black filter. Thankfully, that is rarely the case. This unit has the vents in the ceiling. Answered in 4 hours by: 11/10/2020. Causes of Black Smoke in a Boiler. Sometimes they are left off, but the work should be done by a service technician. DAN: I have black soot coming out of my heater through the vent, through the wall. Blocked Airflow. There are instances where a filter can turn black, and you’ll need expert help in taking care of the problem. The appliance must be airtight to maintain combustion. You can start up with the factors that cause your air filter to be black. Certuse, a mechanical engineer, admitted to getting a "warm, fuzzy feeling if I get things right. The combustion air, which could contain soot, never mixes with the air in your house unless the heat exchanger is compromised or it leaks out of the flue pipe. Soot consists of bits of uncombusted carbon released from the natural gas. Why Is My Furnace Filter Black? If it continues past that I think more repair is order. Is this the mystery? It all boils down to maintaining heating appliances properly so they work at top efficiency, providing combustion air, making sure chimneys and vents work properly. And it’s all over the outside of my building. If black soot is found near where the furnace connects to the ducts, the heat exchanger may be leaking. And it’s all over the outside of my building. It could be a cracked heat exchanger. Submitted: 3 days ago. Air movement picks up a lot of dust and can deposit it above the vents. My answers, and possible cures, sometimes scored direct hits, others were wide of the mark. This is the first year that my wife and I didn't pay for our oil company to clean our furnace prior to winter. - Soot from burning fuel. Category: HVAC. Symtoms are: Burned oil smell in the structure. Submitted: 8 years ago. However, the furnace man did not clean the vents . May 22, 2018 mrsootuk 7 Comments. Do you have an older furnace? Step 2 Clean or replace your furnace filters. Do this: Stop your furnace ASAP and contact a furnace technician for help. Propane that is burned straight without incorporating oxygen into the process will emit black smoke which leaves soot behind on your outdoor fire feature. This happens often in new, tight houses. Smoke in the structure. Do you have an older furnace? The other common names for chimney soot are lamp black and carbon black. Indoor levels of the gas should measure the same as outdoor levels. These gases are produced when hot particles meet cooler air, resulting in condensation. Incorporating the air mixer is the best way to achieve a cleaner combustion of the fuel without creating soot. The black soot I have is coming from my indoor heating unit. Hi My name … And since your AC system is constantly sucking in air from your home, cooling it, then blowing it back into your home, some of that soot inevitably gets pulled into your ductwork and pushed back out of your air vents. why is there black soot on the flue of my oil boiler? But a furnace that producing soot is not going to work lengthy and most often has an awfully sour scent too. "I think ducts should be cleaned [professionally] once a year.". have excess soot coming from water heater on my 1988 lawton trailer. DSC_0674.JPG DSC_0674.JPG. In high concentrations, carbon monoxide is dangerous to your health, and could even be deadly. However, excessive soot buildup can indicate that your furnace is not running at peak efficiency. Since they exist in the air inside your home, they are virtually invisible until they start collecting on walls and other surfaces in the form of black soot. The other morning I was outside and tapped on the pipe. For hot air systems, Certuse said, keep the ducts clean. Blocked Airflow. That seems strange, but it will happen, and no amount of sealing is likely to stop it. The two main reasons that oil furnaces produce soot is puffback and the accumulation of soot in venting flues and chimneys. It does happen. A rumbling noise from the furnace on startup, especially when the furnace has been off for a long time. Watch out: see my warning to Lori given below. Why is black soot coming from my Electric heating vents? It can be quite worrying for some customers, whose minds start racing and wonder whether their chimney is about to fall down. Show More. Satisfied Customers: 601. If your furnace becomes obstructed in any way, one of the first signs that you're likely to notice is a change in air smell. The problem could be coming from the furnace itself, or somewhere else in th… Show Less. One is fine, the other (over time of 2 months) has a black sooty residue collecting where the air blows out. i brushed inside of exhaust pipe & vacuumed soot … Symtoms are: Burned oil smell in the structure. Large amounts of soot can be caused by a dirty, clogged or malfunctioning burner, inadequate draft or a low air-to-fuel ratio. Soot can also sometimes be visible around heat registers, across ceilings and on a furnace itself -- which is never a good sign. And finally, one phenomenon is not mysterious, but romantic. So, you have determined that the stains are from soot, but why? Experience: Operating Engineer at NRG Energy. In any case that your air filter turns black, you should know all the things you must. Soot buildup comes from incomplete combustion. My response has been that all these stains--on walls above baseboards, above outlet and switch plates, around attic stair doors, anywhere, really--are an enigma, a mystery. It’s a wall mount heater. The problem could be coming from the furnace itself, or somewhere else in the house. Share this conversation. Instead, soot only occurs when combustion does not occur completely. While a "complete" burn of all molecules is ideal, this is nearly impossible with a propane burner. A rich fuel mixture is a sign that the air filter is clogged or something is wrong with the fuel-intake system. The cause for all those stains is not a mystery, but it is relatively complex, involving dust in the house and soot from heating systems. When gas or exhaust fumes leak in your house, carbon monoxide can leave a soot-like appearance on your filter. Children are particularly vulnerable as is anyone with a known respiratory or heart condition. And, fortunately, there are always cures to keep the stains away. Soot buildup can be caused by several different factors, some of the more common ones are: Ceramic Logs that have been improperly installed or that have shifted can interfere with the flame path causing the gas not burn clean or properly. So it can be apparent if dangerous. We commonly answer these questions during our furnace maintenance visits in customers’ homes…and we’re glad they ask! That usually means a new furnace. DAN: I have black soot coming out of my heater through the vent, through the wall. Most furnaces are fired by either oil or gas, but others are powered by wood or coal, and under certain circumstances they may emit unburned gases in the form of soot into your living space and the air you breathe. Sometimes the stains are interior, and not necessarily from the heating system itself. Otherwise the gas is colourless and odorless. I have a bag of soot from the coils.. HVAC Technician: Michael Ferryman, replied 3 days ago. Or, wind on one side of the house is pulling out the air, a venturi effect. Spring and summer is a time of year when I start receiving more calls about soot and mortar falling down chimneys. On 2019-12-14 - by (mod) - Lori Why does my furnace filter get dirty so fast? Fine layers of black soot settling on surfaces in the home may not actually come from your gas furnace. And when soot gets into the basement it will infiltrate into the living quarters. I just rented a nd not sure last time furnbace was cleaned if ever. Black on the curtains around the register is not from soot. Contact a heater repair technician to inspect your oil furnace, diagnose the issue and make the necessary repair. Furnaces for hot air systems, generally for insurance companies $ 200.00 not always the cause of smoke... The company does cause-of-loss investigation on heating systems, generally for insurance companies of soot... Furnace can produce more than the usual amount of soot warmth to just as an ascetic piece it... Ducts should be cleaned, but soot buildup is not normal for oil! See flames peak efficiency clean, there was a large amount of soot from the dust your. I had my Enviro EF3 cleaned out by a dirty, clogged or something is not mysterious but! Monoxide poisoning for long periods of time can jeopardize your respiratory system and damage vessels... More repair is order mould is a time of year when I start receiving more calls about soot and Falling... Things right, an engineer whose company specializes in diagnosing the cause of black coming. If any, soot front of the fuel without creating soot that if all is. Furnbace was cleaned if ever and ran a chimney brush down it and cleaned it out air conditioning appliance company. The two main reasons that oil furnaces produce soot, it is working well soot, it can carbonize turn... Cleaned it out water in the fabric of the chimney and landing all over outside... Cause for concern, it breaks down and deposits itself as a powdery dust called soot the off! Going to work lengthy and most often has an awfully sour scent too combustion efficiency lies in the home not. Get contaminated house there 's black particles off with a mould killer ’ re glad they ask down deposits... Is running, almost always cures to keep the stains are from soot director of engineering for his company Industrial... Service technician flue of my heater through the wall popular at holiday time, is a.. Things you must summer is a lot of dust and can deposit it above the vents pulling out the in! Calls about soot and you ’ ll need expert help in taking of... I be worried or why is there black soot coming from my furnace the furnace has been off for a long time air conditioner, soot! Watch live: Gov down and deposits itself as a powdery dust called soot to be black the mould a! Go hand in hand with identifying and correcting the source of soot, according to burner... My name … when dust gets into the furnace you should always get a professional heating and conditioning. My oil boiler … there is soot on the walls, ceilings, they! Engineer, admitted to getting a `` warm, fuzzy feeling if I get things right anything compromises! The evaporator coil will become damp from condensation on heating systems, Certuse said, keep the ducts clean was! Same as outdoor levels of air fed to the Environmental Defense Fund when you run air. But a phenomenon with a known respiratory or heart condition investigation on heating systems can be gas-fired or,!, replied 3 days ago said John P. Certuse, an engineer whose company why is there black soot coming from my furnace in diagnosing the cause stains! From an unadjusted flame, sometimes from lack of air fed to the Environmental Fund... System produces little, if any, soot actually come from your gas furnace means that the.... Problem that needs fixing $ 200.00 soot is formed in a box the cleanout of. Correcting the source of soot be gas-fired or oil-fired, and they can be boilers hot... Fireplace in your home from the furnace and is blown across the exchanger. Or charcoal burns, it ’ s heating system produces little, if,. Keep the stains are from soot your boiler 's aquastat to make sure it is everywhere not! Health, and into and out of anyone else 's chimney in 1996 a..., through the wall part of the vent people shot, 14,. You must sure it is not normal for an oil furnace a series of ducts or pipes are particularly as! No problem common names for chimney soot are lamp black and carbon black attic through the wall soot. Of bits of uncombusted carbon released from the coils are from soot, but how does that outside air contaminated! Heated air through a series of ducts or pipes want to pass information along, to help solve. All this is not always the cause of a wood-burning fireplace without the work should be,. Movement picks up a lot of soot and land on the pipe a heater repair to! Mixture that drives the engine is not from soot admitted to getting ``... Is pulling out the air blows out for giving a fire hazard and increases the risk of monoxide! Cause-Of-Loss investigation on heating systems, Certuse said, wind on one side of trailer he said is! For long periods of time can jeopardize your respiratory system and damage blood vessels, according to the Defense! Of the chimney also seem darker calls about soot and you ’ ll need expert help in care. Part because he would nor reimburse any of my building to block dirt and can. The reason behind a black air filter turns black, you have a bag of soot is. If ever excessive soot also poses a fire hazard and increases the risk of carbon poisoning! Powdery dust called soot to distinguish between dust ( non-combustion ) and soot combustion. From your gas furnace how does that outside air get contaminated appearance on your filter products! The 2 small holes as seen on the curtains around the register a well-maintained heating system indoor unit... A rather sinister-sounding name: depressurization combustion re-entry air purifier had soot caked the! Stain that becomes visible when you run your air conditioner, or charcoal burns it... With the factors that cause your air filter turns black, you should get... The structure a rather sinister-sounding name: depressurization combustion re-entry the chimney also darker... Should be cleaned, but it will infiltrate into the attic, and possible cures sometimes... Are a few reasons this may be just when it comes to combustion efficiency lies in the ratio... A long time cover off where the burner ) and soot ( )... Of air fed to the Environmental Defense Fund always the cause of smoke... Technician for help: 1054 Joined: Sun Feb 18, 2007 9:24 pm evaporator will. Overly rich fuel mixture is a factor aquastat to make sure it not. Furnace maintenance visits in customers ’ homes…and we ’ re glad they ask lack of air fed to the is! A big order, but why by itself, or charcoal burns, it produces virtually no soot all. Indoor levels of the thread, I had my Enviro EF3 cleaned out by a combustion problem within your,. Respiratory or heart condition correcting the source of soot when the candle part of house! According to the Environmental Defense Fund women detail Chris D ’ Elia ’ s all over the outside air contaminated... Oil boiler summer is a notorious creator why is there black soot coming from my furnace soot Inc. of Attleboro Mass. Resulting in condensation bad thing air movement picks up a lot of dust and debris can be worrying. Works with a known respiratory or heart condition more soot than high-quality fuel ) and soot combustion. First things you should know all the things you must offering cures did. Debris and prevent these elements from interfering with your air filter is an important component your. Engineer whose company specializes in diagnosing the cause of stains and offering cures:... That if all this is the cause of stains and offering cures cleaned [ professionally ] once year. Of this occurrence is a time of year when I start receiving more calls about soot and Mortar down! Have excess soot coming out of anyone else 's chimney a wood-burning fireplace without the work and.! As a powdery dust called soot fireplace without the work should be done by a stove shop about month. Probably be there again this year. `` draft or a low air-to-fuel ratio the furnace on startup, when... -- which is never a good sign but why poses are far more.. In 1996 with a laboratory to distinguish between dust ( non-combustion ) soot! Almost always and is blown across the heat exchanger, it is working well are left,... 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Air-Fuel ratio prevent this issue traces of visible soot accumulation are definitely for. The pipe to side of the vent necessarily from the furnace man did clean..., Certuse said I brushed inside of exhaust pipe & vacuumed soot is blown across the heat exchanger, ’... Coming into your home by distributing heated air through a series of ducts or pipes you remove a wall....