Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. (above) provided a concise and accurate explanation of how a puffback explosion occurs - the ignition of un-burned heating oil in an oil fired heater that leads to an "explosion" or puffback . Armstrong, Janice Gray, Deborah Gangloff Dowd, Martha V. Pike, and Susan Stitt. But also see THERMAL TRACKING & HEAT LOSS as other things can cause black stains indoors. Depending on the quantity of … It happens to oil burning furnaces and other heaters. When your oil furnace malfunctions it can cause a puff back or delayed ignition that happens when atomized oil travels to the combustion chamber, but does not ignite right away. Click to Show or Hide Citations & References, Cause, Cure, Prevention of Puffbacks on Boilers, Furnaces, Water Heaters, ARTICLE INDEX to HEATING OIL, OIL BURNERS, OIL FIRED HEATERS, OIL TANKS, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. Definition of heating system puffback: a puffback at oil fired heating equipment is literally an explosion of un-burned oil in the combustion chamber of an oil-fired boiler, furnace, or water heater. I suspect that your insurance company either does not understand these facts, that their policy does not distinguish between improper or inadequate maintenance of the heating system and actual defective heating equipment, or that they are speaking a bit loosely (read carelessly) and are calling improper or inadequate maintenance (your responsibility) a "defective boiler". Learn How Puff Back Fires Originate And Tips For Reducing Your Potential Risk If your home has an oil burning furnace, there are several dangers to be aware of. The floor is not slanted and raised at the threshold. When your oil furnace malfunctions it can cause a puff back or delayed ignition that happens when atomized oil travels to the combustion chamber, but does not ignite right away. Picture a car’s exhaust as another example. The issue typically falls on the ignition function of the oil burner. Can you help me in answering the questions I originally raised in my e-mail to the chief [below]? Regarding your note that the furnace did not stop running after the puffback event, that's quite plausible and I agree with your contractor's explanation that the furnace tried to run in response to the unit's temperature control - not a device that senses that a flue has come disconnected nor that a burner is operating poorly. Our photo (left) shows an incompetent and potentially dangerous "fix" to an oil fired heater that was blowing soot all over itself and the furnace room. The explosion blows soot and other debris through the furnace's exhaust system and into the heating system, which carries it … My Bedroom which was down and narrow corridor on the first floor about 40 feet from the boiler and under the basement windows, which did not shatter. An inherent vice in an oil burner or oil fired heater that might contribute to a puffback might be a boiler or boiler control design that made the unit difficult to properly clean and service or adjust, but I'm not aware of such. 4. A loud noise like a BANG when the oil burner ignites is usually a sign that un-burned oil in the combustion chamber is being ignited at burner start-up. Finally, and most importantly, restoration companies can help repair your heating system, boiler or water heating and determine the cause of the failure in order to prevent a puff back from occurring in the future. We could test an insulation sample at various depths for soot levels, but frankly it is most likely not cost justified to do so. Many times these items will be packed up and cleaned at a facility using specialized cleaning equipment. where we also list the location of all of the various reset buttons and controls found on heating equipment. The explosive force lifted and threw the entire flue pipe off he furnace and ripped it out of the wall where it connected to the chimney and landed in two two pieces to the right and left of the furnace. A puff back is an explosion of un-burned oil in the combustion chamber of an oil-fired boiler, furnace, or water heater. Service technicians need to notice conditions that are likely to presage or even explain a future puffback such as excessive sooting, chimney draft problems, even more subtle clues to draft problems such as a missing draft regulator, visible oil leaks, difficulty obtaining proper draft at the fire and in the breech, repeated service callbacks. Queensbury, NY The unburned fuel lying at the bottom of the combustion chamber ignites as oil fumes build up around it. We describe the warning signs that a puffback problem may be developing and we give advice on what to do to prevent puffbacks. A puff back is an explosion of buildup oil in the burning chamber of a furnace, boiler or water heater. Definition of puffback. Your oil burner went into the ignition cycle and oil was atomized and pumped into the firebox. Commonly called puff back, improper ignition occurs when the oil is pushed into the combustion chamber but is not immediately ignited. For example a puffback could loosen an oil line connection, resulting in a greater air or oil leak than was present before the event. When an oil burner puff back occurs, the damage that can be caused by the black smoke that billows throughout the building damages everything the sooty smoke comes in contact with. A puff back is a misfiring in an oil burning furnace that can send soot throughout your home, covering drapes, bedding, furniture, cabinets, walls, and everything in between. This is DANGEROUS and can damage the heating equipment, blow off a flue vent connector and as a "puffback" can blow soot throughout the building. When a furnace misfires, it spreads soot throughout your property either gradually or … These events often require an extensive cleanup and restoration in addition to repairs on your heating system. (In contrast, an oil burner that is running poorly often will result in a shut-down by the flame sensing device if a cad-cell sensor was in use at the primary safety control. Most puff backs can be avoided if the boiler or the oil fired water heater are kept in good shape and taken care of by an oil burner service professional. A competent onsite inspection by an expert usually finds additional clues that help accurately diagnose a problem such as the exact cause of the heating system event as well as its effects on the building. Definition of puffback. 3. As far as your questions about the direction and extend of the force of the explosion, the amount of soot I am afraid that I do not have any expertise in that aspect of oil burner emergencies. A puff back occurs when an oil burner backfires, sending soot throughout your home, covering drapes, bedding, furniture, cabinets, walls, and everything in between. a poorly-operating oil heating appliance will often send soot into building air for quite some time before a puffback event. Skip to secondary content. 1. In my experience it's proper maintenance that is central to proper oil burner operation, combined with two additional factors: Occupants or owners need to notice when the oil fired heating equipment is not working normally (smells, soot, odors, loss of heat), and then to ask for service and repair. If there is lots of smoke, carbon monoxide or a risk of a fire leave your home and call the fire department. But the immediate cause is the ignition of incompletely-burned or un-burned oil in the combustion chamber - an event that certainly has other causes (such as air leaks in the oil piping or any oil burner operating problem that prevents complete combusion). Watch out: if the reset button on your heating equipment has popped, you might press it ONCE to see if the equipment will run and provide heat (or hot water) while you wait for repair service. We had a puffback recently in our home and the mess was unbelieveable. The soot residue from a puffback has different binders. Restoration companies can help clean your affected belongings such as clothes, dishes, electronics, curtains, and decorations. 2 : a strike-back of the flame in a stove or oil burner. Puff Backs are caused by problems with the furnace, which leave oil in the ignition chamber that doesn’t get burned. Air currents indeed can move in unanticipated directions and pathways in a building, as can soot and debris, but from a puffback I'd expect soot to leave a trail from point of origin to various destinations. Furnace puff-back clean-up may be needed after a sudden explosion or over a time of gradual soot release. I do know that puff backs can be of varying severity. If your oil fired furnace has suffered a puff back, call KPM Restoration at 518-859-9769 for immediate service. PLEASE DO NOT REMOVE THE AIRGUIDE FROM THE BURNER. A puffback occurs when an oil-fueled furnace breaks down and causes a sudden “puff” of oily dust particles that settle everywhere. Albany, NY Your heating service technician would be expected to examine the combustion chamber and the accessible/visible boiler internal surfaces and components for physical damage as well as to accurately diagnose and fix maintenance problems that can cause puffbacks. Finally, although it is much less likely, a boiler that had just been serviced, and serviced properly, could have still have a puffback if, for example, a contaminant in the fuel tank or fuel delivery led to a clogged burner nozzle. I am new at this stuff, so your help is much appreciated. A discussion of this particular photo and those rusty sooty fragments in view is found. If you hear noises when your oil burner starts each run cycle, perhaps a more modest "PUFF" or a small "bang" sound, unburned oil is probably being ignited. mike,smoke and oil smell threw out my house every time my heat goes on everything seems to be running fine so today i replace both filters ,cleaned the nozzle, clean ducs above unit and it still happened.whats next? Furnace puff-back occurs when soot and oil blow back out into the house. You’re at the best WordPress.com site ever. Whether you have a hot water heating systems, gas furnace, or oil furnace in your Babylon property, there’s always a chance for puff back. The service professional can adjust and replace all the parts that are wearing out or possibly failing on your boilers burner. The best ways to avoid an ugly and dangerous oil burner puffback. Another defense is to keep the area clean around the oil burner. Skip to primary content. Danger #4: Puff Backs Puffbacks are not easy to deal with. An oil burner puff back is undoubtedly scary, and quite often a very destructive event that homeowners can often avoid through proper maintenance. that cleanup requirements may be extensive and ... expensive. If you see soot, rust flakes, and debris in the flue vent connector this means that the heating system needs to be cleaned and serviced. It requires expensive cleaning and restoration in addition to repairs on your heating system. What is interesting is the batts of insulation do not appear dulled or have soot adhered to them in the eyes of the insurance inspector. If the chimney is not maintained, then I am guessing the soot will build up in the chimney and then eventually back down into the furnace. Furthermore, because of the physical shock to boiler components during a puffback explosion, I wouldn't assume that the post-puffback boiler would run exactly as it was running before that event. What is Puff Back? It should be apparent that you would not expect soot from a puffback to be invisible near the heater but more severe in a hidden cavity such as within layers of subflooring. They can help assess the heating system and make the necessary repairs before turning your heat back on. Debris visible in the flue vent connector (stack pipe) visible through the barometric damper draft control opening. "A furnace puff-back: the unique problem of soot on objects and costumes." Sooty puff-back; Burner shutdown; Oil spillage around the storage tank; If your storage tank is installed under the ground, get help from an oil burner technician to test the device for traces of water in the heating oil. Depending on the quantity of oil that is ignited, the puffback can damage the boiler itself, may cause the flue vent connector (stackpipe) to become disconnected, and may blow soot throughout the building. You can confirm that by visual inspection. Puff backs can affect every inch of your home. Lack of regular inspection and service of oil fired heating equipment risks loss of heat and related building damage, or sometimes, a messy and dangerous puffback. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. AIRGUIDE: A common error made with the AFG and other high static pressure burners is the removal of the airguide from the housing. Very helpful site on all aspects of boiler service. Any furnace can experience a puff back, while puff backs are more common with oil systems, a furnace puff back can also occur with forced air, gas and hot water heating systems. One cleaning chore you can handle yourself after a puff back is the changing of … The best advice is to keep your oil burner in good repair. The cause of the explosion and concussion which was felt throughout the house was what my heating contractor calls late ignition. A puff back is a misfiring in an oil burning furnace that can send soot throughout your home, covering drapes, bedding, furniture, cabinets, walls, and everything in between. Without them you stand to have these problems. A problem with the oil tank itself that might be related to a puffback might be a water leak into the tank that led to water in the fuel, picked up when the oil level was low (water waits on the bottom of the tank) or right after an oil delivery (stirs up water in the tank) and that subsequently led to poor oil burner operation. A complete cleaning of surfaces affected by soot and/or smoke and also setting up equipment to start cleaning the air within your home. This can be caused by leaks in the oil system, bubbles in the oil line which expand and press oil out of the oil burner nozzle, the shutdown valve on the oil burner nozzle not working properly or a clog in the nozzle. The unburned fuel lying at the bottom of the combustion chamber ignites as oil fumes build up around it. These include: Watch out: Sooty, smelly, noisy oil burner operation is a warning: you may be headed for a puffback: Sooty oil burner operation, blowing soot into the boiler room or other building areas, is not normal and it means that the system needs inspection, diagnosis, service, and repair.Watch out: A puffback that blows apart the heating flue vent connector risks a building fire or the release of combustion gases into building air. The Remediation Company suggested by the insurer says that the soot on the wall is slight and random and mostly in the corners occupied by spider webs. for this type of Heater puff back/oily smoke, a dry cleaning sponge works best on all surfaces, to prevent smearing. A puffback is an explosion inside the burner chamber of your oil furnace. I then turned off the emergency switch at the head of the stairs when the smoke started to clear. I wonder whether the concussion reaching down the corridor is demonstrable and whether the intensity of the explosion could have bounced off the chimney wall and headed down the length of the basement to the bedroom area above. In either case the system needs to be inspected, the cause of the noises diagnosed, and repairs made. In either case the system needs to be inspected, the cause of the noises diagnosed, and repairs made. That said, here are some things to consider: Watch out: The first priority is to make sure that the heating system and chimney are safe to operate. If your home has an oil burning furnace, an oil burner puff back can occur if there is a build-up in vapor, which upon ignition, can explode. It contaminates the air, as well as any surfaces it might happen to coat. It occurs when excess fuel builds up in the combustion chamber of a furnace. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Macmillan Publishing Co., NY. which sets forth the facts of my recent oil furnace explosion. Follow the soot trail of depositions in the building. We discuss oil line leaks (air in or oil out) as a common and important cause of oil burner poor operation that can ultimately lead to a puffback. If the heating system has not been serviced, then this clue means service is needed. A puffback is an explosion inside the burner chamber of the furnace or boiler (hot-air systems use furnaces, and steam or hot-water systems use … The various possible underlying cause of excess oil that is ignited at the start of a heating boiler on cycle and that fuels the puffback, are listed in the article starting with "leaks at equipment oil supply piping" and include a variety of problems. When the oil eventually ignites, a puffback can occur. Further is soot stain always accompanied with a delayed ignition explosion or are they somehow consumed or dispersed by the concussion or rush of air. Tom, I think it might be smart to get a certified chimnmey sweep to inspect and advise about the flues; puffbacks can get worse and serious, even dangerous; We don't know if it's a blocked flue, damaged flue, or bad design. Although such explosions are usually small and confined to the burner chamber, they can do considerable harm to your oil heating system. The soot particles are small and are very difficult to clean. There was no fire thankfully. Commonly called puff back, improper ignition occurs when the oil is pushed into the combustion chamber but is not immediately ignited. Vacuuming the carpet and wiping down the walls with soap and water is not enough. But if it were my house and oil smell and smoke were being sent by my heater throughout my house I would TURN OFF THE SYSTEM IMMEDIATELY and would call my oil heat service company for emergency service. We have no relationship with advertisers, products, or services discussed at this website. They generally accommodate retrofits to … Here we explain oil burner or oil heating system puffbacks: what happens, and what causes them. Puff backs don’t occur in furnaces and oil-fired boilers alone, but in water heaters as well. The most common causes of the presence of this un-burned heating oil fuel are various sources of improper oil burner operation that leaves incompletely-burned heating oil at the end of one or more on-off cycles of the oil burner. If the heating system has "just been serviced" this debris means that service was incomplete. It sounds like you experienced a puffback AKA delayed ignition. Contact a full service restoration company. A puff back occurs when an oil burner fails to ignite immediately and the fumes build-up, causing the furnace to backfire. Before a catastrophic puffback occurs, most heating equipment will give plenty of warning in the form of heating oil or combustion gas odors and soot in the building. I have read that the cleanup can be extensive. I also note that the faceplate outside of the fire box was loosened and the insulation around the plate protruded from the plate and was charred at the very ends or rims of the plate. Suggest anything different. It did not ignite right away and when it did, there was too much atomized oil and the result was a small explosion instead of just an ignition. Here are two more possible causes of oil burner puffbacks: None of these are innate defects in the heating boiler itself. The issue typically falls on the ignition function of the oil burner. Puff Back is a sudden combustion of smoke and soot emitted from a heating unit, resulting in a cloud of black, greasy petroleum-based gunk. The severity of the event depends on quite a few variables including particulars about the heating device where the event occurred, the quantity of oil being ignited, building layout, room sizes, and more. 800-311-8828 Accessories Buildup of debris can also create an excessive explosion at ignition. Whether you have a hot water heating systems, gas furnace, or oil furnace in your Long Island property, there’s always a chance for puff back. A puff back is a serious problem that you should treat as an emergency. In my experience the event is usually supported by onsite evidence - certainly your description of what you saw and heard is compelling. Can you point me to some references with respect to the following facts resulting from furnace explosion in my basement in Long Island which seems of similar origin to some to the secondary effects you raised in your article. 1. Any furnace can experience a puff back, while puff backs are more common with oil systems, a furnace puff back can also occur with forced air, gas and hot water heating systems. What I can tell you is either the oil is not present in full volume at start up or the transformer is weak. We explain why puffbacks can be dangerous, as well as expensive. Apologies for the delay. We describe how to inspect, troubleshoot and repair heating and air conditioning systems to inform home owners, buyers, and home inspectors of common heating system defects. A puff back occurs when an oil burner doesn’t ignite right away and as a consequence fumes build up in the furnace. If you see soot, rust flakes, and debris in the flue vent connector this means that the heating system needs to be cleaned and serviced. The soot travels through your furnace’s exhaust system, which in turn expels the soot and debris throughout your house. Your site has been very informative! 1. These instances are caused by a malfunctioning heating system.
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