Then it puffsseveral times for about 10 minutes till the smoke clears up an it starts burning good Pellet stove smoking on startup, Oct 6, 2019 · What Causes Fireplace Back-Puffing? How Can I Prevent It?There are few things as relaxing as sitting next to roaring fire. Puff-backs are usually associated with oil furnaces, but wood stoves are also susceptible. Feb 2, 2021 · Active since 1995, Hearth. Aug 31, 2008 · Active since 1995, Hearth. We call it back-puffing when smoke comes out of the fireplace while the door is open. Using wet or unseasoned wood leads to inefficient burning, producing more smoke and moisture. Puff backs, or back-puffing, occurs when gasses are trapped in the firebox of the stove. Here are some of the most common: May 4, 2013 · Using wood that is split very small, which also burns too rapidly, creating an excess of combustible gas in the firebox. Caleb explains the different aspects of back-puffing, what causes it, and how to prevent it in the future. Dec 21, 2006 · I once had a barrel stove in a hunting shack the a real bad back-puffing problem, not a single puff be a continuous series at like 5 to 10 per second. The furnace is very tight, holds great all night long even on the coldest of nights. The stove has an 8" rear flue that runs 2' horizontally into a T Nov 12, 2019 · 5. Im thinking it was back puffing cause its so warm out? When I reloaded at 1130 last night all was fine I checked the stove at 1215 set the air to 3/4-. A properly drafting chimney will pull the correct amount of air into the stove and will provide you with excellent performance and heat output. A minor puff back may only release a small amount of soot, while a severe puff back can release soot throughout your entire home or business and cause damage to heater components. Jan 31, 2012 · Active since 1995, Hearth. When the wood hasn't charred yet, it is outgassing intensely. Read on to learn more! Jun 27, 2025 · Common Causes of Puff Backs in Fireplaces Here’s why your fireplace might be back-puffing smoke into your home and what you can do about it. If you need the right parts to get your draft back on track, browse our complete Vermont Castings parts selection. I find this Thank you for your thoughtful and well-articulated responses re: back-puffing in wood stoves. Open a nearby window before you start your next fire. Smaller loads of wood, larger pieces of wood and avoiding overly dry wood loaded into a very hot stove may help this problem. Wood burning stove puffs fire & smoke through front vent knobs when coals are stirred up. Nov 27, 2021 · Hello all, new to the forum. Here's a simple tutorial on how to replace the baffle of your wood-burning appliance - stove, insert, furnace or fireplace! Required: To remove the old baffle: 1. c Dec 8, 2023 · Burn Technique/Wet Wood: The way wood is burned, and the condition of the wood itself, play significant roles in back drafting. Say goodbye to smoke issues and enjoy a cozy, warm home all wi Feb 4, 2017 · Active since 1995, Hearth. century-heating. 3. Oct 11, 2007 · I had a similar problem with the Defiant CAT stove. If back-puffing persists, contact your dealer or qualified chimney sweep to help diagnose the problem. Sep 26, 2020 · The cap will also prevent “back puffing,” whereby escaped smoke from a fire re-enters the chimney and then the home. Is your wood-burning fireplace smoking up your home? Chances are, one of these common problems is to blame, but these tips will help get things burning clean. If the flashbacks occur when you are loading the stove, then you are not properly timing your loads and preparing the stove for loading. the chimney itself. I had to pull logs out of stove and take outside to stop fire and back draft. It can even come out of the draft! Back puffing will occur more frequently in fall and again in spring when the outdoor temperature is not that cold. Back puffing is often a problem with very dry wood such as kiln dried lumber. It typically happens a little after closing the damper. I can then usually open the damper back up and clear it up. This will cause “back-puffing,” or smoke coming back down the chimney. Jan 18, 2020 · Why is my wood stove smoking? We've explained the main reasons why your wood stove is smoking so much, using our own wood stove for reference. What kind of stove? And (to me) what is your chimney made of? Oct 27, 2007 · Even in a new stove, back-puffing can be the result of suddenly changing the air supply to a new fire. What is an oil burner puffback, What causes sooty puffbacks on oil fired boilers, furnaces, water heaters? Why are puffbacks dangerous? How to detect, diagnose, and prevent boiler or furnace puffbacks Jan 7, 2019 · The severity of a puff back depends on the type of heater, how much fuel gets ignited in the combustion chamber and what caused the puff back to occur. Carbon monoxide (CO) is an invisible, odorless gas produced during incomplete burning. If you open the door too quickly, smoke will be drawn into the room. Another problem is getting the entire firebox full of wood up to temperature so that it pyrolyses (smokes) and then shutting the draft way down for the long burn. The hotter it stays, the less mother nature can force wind back down your chimney. Jan 5, 2018 · Fireplaces, Wood Burning and Heating Stoves, Flues and Chimneys - Wood stove backdrafting tons of smoke on windy days - We have a wood stove here as our primary source of heat, works great in general but on windy days we tend to have to put the fire out because it blows very thick smoke down thru the chimney, thru the Jan 16, 2019 · If your chimney extends the required height above your roof and wood stove smoke is still back puffing into your home, you may need to put a special chimney cap on the pipe. Dec 19, 2018 · Does your wood stove or fireplace seem to create an unusually high amount of smoke in your home. Jul 28, 2011 · But wood stove season is not too far away. No way to stop smoke from flooding house. But like all good things, wood stoves can sometimes give us a bit of a headache. The woodstove itself is often blamed, but Vermont Castings Dauntless keeps backpuffing Hey all! My VC stove starts back puffing once it gets a good layer of coals on the bottom. Not enough to choke you or even burn your eyes, but way more smoke than anyone would accept in their house. Nov 16, 2011 · A blow back occurs when the stove gets a "breath of fresh air" from a down draft or just an area of wood in the stove that is just about ready to flash over. ) and chimney and chimney connectors. Load towards the back of the stove: When reloading woodstoves, you should rake the coals towards the front and load your wood towards the back. May 11, 2010 · The only way I have experienced back puffing with these stoves is when you cut back the air too fast while in the secondary mode. In this guide, we’ll take a deep dive into the most common wood-burning stove problems and provide practical solutions to keep your stove running smoothly. Recently had issues and had a sweep come out- cleaned all up well and smoke issues went away, got a clean inspection report. Here The wood stoves I used growing up had an air intake grill or pipe with a damper, and we adjusted it to control this backdraft and burn speed; seems weird just about everyone is suggesting cracking the door open. We recommend opening the door slowly and cautiously to balance the pressure inside the wood burner when putting wood on the fire. We talk about the different solutions for back drafting wood stoves! For questions, call 801-489-5052For FREE ESTIMATES visit https://www. We would like to show you a description here but the site won’t allow us. I have a wood furnace with automatic draft that is controlled with a thermostat upstairs. Aug 3, 2022 · Also known as back puffing, backpuffing, woodgas explosion Symptoms are: Smoke coming out of your wood stove or insert - often in a single PUFF, but sometimes as a series of puffs (like a train steam engine - puff, puff, puff) This is caused by In addition to preventing "back puffing," chimney caps increase the efficiency of your fireplace or wood stove and decrease cold drafts. Being pine, it also off- gasses at a very high rate as compared with hardwoods. Be sure to let us know if you have any questions or comments! Wrong temperature? Too much wood? We don’t really load it up but rather keep it burning at a healthy temp by continually adding a few logs as we haven’t really gotten down a routine with the stove yet. Keep your chimney clean, your seals tight, and your wood dry, and your stove will reward you for years. Nov 22, 2011 · When back puffing occurs, that smoke will seek out the easiest way to get out of the stove. In this video: I discuss some of the causes for a backdraft in a fireplace wood stove or other type of wood burning Appliance. Whistling Whistling is a result of the air needed for combustion entering the stove through restricted airways and across sharp or angular edges. If you have ever experienced a puff back, you know it’s time to contact the chimney sweep. com/en/products/stoves/wood-stove-on-legs-model-s245e/). May 2, 2025 · If you recently had new doors or windows installed, and then noticed a back-puffing issue, try introducing airflow to the fireplace when it's burning. We've been experiencing this on and off (but increasingly so) for the past couple of years. Why Is My Stove Making An Unexpected Noise? Some wood or solid fuel stoves can produce unexpected noises from time to time, and is sometimes considered part of the charm of owning a wood burning stove. 2 cm) (A) from a side wall and 8. You need positive draft in your chimney when you light the fire. Nov 4, 2016 · It’s very tight. Feb 22, 2009 · While I have used wood heat all my life and seen the occasional random puff of smoke from around the door, damper and flue pipe, last night our stove filled the house with smoke. Stoves are designed to avoid this but Cold dense air falls into your firebox pushing smoke into the room - to avoid smoke entering your home lengthen your startup time & warm your stove up slowly. We'll go over some of the most common reasons why fireplace smoke blows back into your home so you can start enjoying your fireplace worry-free again. Have you cleaned your combustor lately? Or checked the protective inconel screens at the ceiling of the firebox? This winter has been particularly eventful with drastic changes in the weather. Sep 10, 2021 · Six out of ten times, when people think their wood stove is smoking, the problem actually starts because they are trying to start a fire with wet wood. Its like the draw is definitely pulling up the chimney but then it coughs a smoke puff through the joints in the chimney pipe (the first 4 feet is not double insulated) sending smoke into the room. When draft is weak, it means the smoke doesn’t have enough force to exit the stove and ends up in your home instead. Aug 14, 2025 · Discover the causes of wood stove back puffing and learn 7 expert tips to prevent it, ensuring safe and efficient use of your wood stove all winter long. Jun 14, 2025 · Discover 5 proven hacks to fix stove back drafting and enhance your wood heat efficiency. Back-puffing happens when the smoke becomes dense enough to ignite in the firebox. Caps also prevent acidic rainwater from entering and corroding the chimney. 5 and went to bed. Jan 1, 2019 · The upper fireplace "back puffs" when the fire isn't burning hot. What would cause my stove to smoke when I first light it. Insufficient gas (air) flow in the stove, so gases are not combusted and Apr 15, 2025 · If your home smells like a wildfire, it’s time to figure out why your wood burning stove is smoking and how to get rid of the fumes. >> Feb 13, 2015 · Active since 1995, Hearth. the gases seem to build up in the stove and then ignite every 4-5 minutes causing a small burst and bumps the griddle up. Do ya'll think back puff or maybe something else? Final Word A Vermont Castings stove running with healthy draft is a joy – steady flames, cozy heat, and minimal smoke. Nov 16, 2019 · We occasionally get back puffing. Draft is essential in directing smoke out through the chimney. How Your Chimney Can Force Wood Burning Stove Smoke into the Room So, let’s now tackle the most common cause of a stove puffing out smoke…. When your home is closed up your appliances that vent to the outside (like you furnace, your clothes dryer and your fireplace or woodstove) take air from the inside and “push” it to the outside. Nov 16, 2013 · Can you please go though all the thing that can causes back puffing in a wood stove? Trying to find the problem in my stove set up. Making sure that your combustor and its protective screen are clear of ash build up will help ensure t Vacuum to extreme pressure in milliseconds! It was out for a while and scared the shit out of me! How can you stop smoke from coming into the room when you open the wood burning stove door? This is a common question and the solution is known as 'burping' your stove. 25 inches (21 cm) (B) from the back wall. Once the wood is burnt and starting to coal (it may look like a log still, but it's a big piece of coal), there isn't water left to burn out of it, so the cat can't get clogged as it cools down over coals. The conditions required to get back-puffing are almost always caused by having smaller amounts of fuel loaded down in a part of the stove that isn't in the path of air from the air wash, secondaries, or the lower air inlet hole. Also, filling the stove and then turning the draft down too much will definitely cause it. You Have a Blockage In such cases you should consult a stove installer to re-calculate the height of the flue system so that it can be increased to bring it back into line with Building Regulations requirements and will work. We're burning very dry Sep 26, 2024 · Yes, you absolutely can get carbon monoxide poisoning from a wood stove if it is not installed, maintained, or used correctly. Wood loaded in the back of the stove is more likely to stop smoke coming out of the wood burning stove when the door is open. i have an 80's model, Dutch west airtight wood / coal stove, only source of heat for my house, up here in Maine, I burn under 5 cords a year. com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment. You’ll burn less and enjoy a much more consistent, safe heat. This not only increases the risk of creosote buildup but also affects the draft in the chimney. If the air supply is suddenly cut off, it can fill with smoke that is rich with volatile gases. Jan 1, 2013 · The smell is pretty much gone and the stove hasnt done that again for about 45 minute. Active since 1995, Hearth. Dec 26, 2009 · Active since 1995, Hearth. The fire dies down and then it suddenly bursts alive again accompanied by a burst of smoke that escapes from the stove. The stove is in the basement and had a flue pipe to an exterior chimney rather than a chimney that runs through the interior of the home. Oct 22, 2008 · I have a VC encore catalytic which is giving me a lot of trouble puffing up through the top griddle. Put a damper in an open positiomore Wood stoves are beloved for their ability to provide warmth and ambiance. 1. I occasionally have a problem with back puffing. We used to have terrible back-puffing with our old stove, yet when you opened the bypass around the cat, it would run away instantly because of the strength of the draft that was already present. Feb 10, 2006 · Here is what is happening. It always stopped back puffing when I would open the air control just a little. The wall of a vertical vent pipe must not be less than 25 inches (63. maplemtnfireplace. They keep out birds, small animals and prevent chimney blockage from debris or nests. 5 cm) (C) from any wall. Whether it’s trouble igniting the fire or dealing with smoke leakage, troubleshooting these issues promptly ensures your stove remains functional and efficient. 6” stove pipe stuffed into an 8” chimney pipe ( SS smooth liner pipe) the sweep packed the transition with insulation and said I could get A damper on a wood stove is either mounted in the chimney or in the stove itself, and it is used to block off the air flow going out. The stove shall not be less than 17 inches (43. Last year I had this problem a few times so Wood stoves work by way of a natural draft system that pulls combustible air in from the room and vents it through a flue pipe that carries the warm air up the chimney and to the outside. Inadequate draft may cause back puffing of smoke into the room and creosote formation in the chimney. Creosote Buildup Creosote is a flammable, tar-like substance that forms when wood is burned. Yet, even the best top-loading wood stoves can develop problems over time. The problem seems to occur when the draft Back Puffing (when my fireplace is smoking up the room) indicates that a fire is producing smoke faster than the chimney draft is pulling it out. Let’s dive into the main reasons wood stove smoke backs up into a home and explore solutions to keep your stove working effectively. Back Puffing? Newly installed Regency i2500 catalyst wood insert with half a cord burned into it so far of fully seasoned firewood started to back puff this evening. We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues. When it ignites it sometimes will ignite the rich smoke in the stove quickly enough to increase the pressure within the stove. There are several reasons a fireplace or stove may begin back-puffing. Check out our beautiful, modern, and easy to use wood stoves! 6. Stove has started back puffing recently, first I heard it and saw smoke come out of the air intake in the back. I got the fire going easily, got the stove griddle up to temp with 20 minutes at the 55o degree mark, shut down the damper and had the intake Jun 7, 2022 · Draft is the force which moves exhaust from the appliance up through the chimney. Smoke not going up the chimney? Stove taking too long to heat? These hitches are common but solvable. Before we tackle the issue, a brief explanation of how a stove works and why smoke is often coming out. VC Defiant Encore - 2550 (Sold) Aug 16, 2010 · I have an Osburn 2300 and when it is real windy I get draft back and smoke comes out the back of stove and fills house with smoke. From a damaged damper to wet firewood, the root of your back-puffing problem can usually be found easily. If there's a lot of flame in there, the heat and draft carry the smoke up the flue, like it's supposed to. You can hear the combustion chamber roar up and then you see a fireball in the fire box, emitting a puff of smoke out of the top loader. That is, of course, assuming you aren’t startled by a sudden, audible bang with a cloud of soot and smoke filling your room. Dec 16, 2014 · Active since 1995, Hearth. Valley Chimney helps provide a better understanding of why your fireplace may be back puffing in the informational blog below. If you’ve never experienced this, count yourself lucky! Whenever your appliances – from fireplaces to stoves – push their smoke back into Back-puffing and creosote build-up in a stove indicate that the fire produces smoke faster than the chimney draft pulls it out of the stove. There was already a well established bed of wood charcoals, I half loaded it. Should I be concerned? Dec 4, 2015 · A) Because it is not truly an air-tight stove B) Because in a back puff situation smoke will find its way out of every little crack and crevice in the stove (sometimes joints, gaskets, incoming air, around stove air controls, etc. Since there are mechanical and operational causes for the condition, there are also mechanical and operational remedies. Starting yesterday anytime I fill it back up with wood let it catch and close the stove pipe damper all the way it will puff smoke back at me every few seconds. Sounded like a pulse jet, which in effect it was. That can, generally, have two causes. Sep 21, 2023 · The gentle crackle of burning wood and the comforting glow they produce can turn any room into a cozy sanctuary. The first step in preparing to light a fire in a fireplace or wood stove is to open the damper. Why does this happen? The underlying cause of back puffing is negative pressure. Mar 21, 2024 · Back puffing happens when the amount of combustible gases in the firebox increases because there is not enough oxygen to burn them. Dec 4, 2009 · to the flue more quickly, let more air into the firebox. In this guide, I’ll Walk you through the causes of fireplace backdraft, share effective solutions to fix it, and offer tips on preventing it from happening. I started a fire tonight because it is sopposed to get down to 42 tonight, or it seemed like a good reason to use my stove. Today my wife observed it coming out from all around underneath the top plate. Last winter we were unable to use our small wood stove much because at the end of each burn, as the fire was dying down, we got backpuffing from the chimney near the ceiling (this is our wood stove… https://www. Got the wood lit, then waited to 600 degrees and closed the bypass damper. At some point it'll explode, causing a pressure wave that pushes the smoke out, aka back puffing. " PE Alderlea T6, Jotul F602 Dec 8, 2018 · Here is a How To Video on how to reverse the negative back pressure (Back Draft) in your wood stove or fire place - Furnace. Dec 12, 2021 · We're not experts on that specific woodstove feature but in reading through a number of catalytic wood stove installation manuals we found it apparent that a lot of ink is given to proper draft management, and it's a common warning that inadequate draft is likely to produce puffing or back-puffing huffing from a catalytic wood stove. Make sure you purchase well-seasoned wood. But the stove seems to back puff often if that is the right word. I found that you really could not just close it all the way down as the gasses in the stove build up (the fire is smouldering in there) and then ignite. If the air flow is blocked, whether by a physical narrowing of the flue or because depressurization near the stove leads to air being forced out of the stove instead of drawn in, the result is a downdraft, or Sep 24, 2025 · If the wood is green, it may create a thicker, more abundant smoke that your flue may not be able to handle. Dec 5, 2022 · Have you noticed smoke coming from your log burner? Find out more about why your stove might be smoking and what to do to prevent it. Once those gases ignite from the existing coals, they can literally explode. The stove was brand new to my brother, before he handed it down. . Sometimes people will see smoke when lighting a woodstove, while it is burning, or when they open the door of the stove to add wood or tend to the fire. It lines the inside of your chimney flue and restricts airflow, eventually forcing smoke to back up into Nov 6, 2019 · Is your wood burner producing too much smoke? Maybe it's even puffing back into your room? Read our guide to find out why this might be. Stoves that backpuff or smoke at start-up are extremely annoying, but fortunately the cure is simple. It can be surprising, the number of people who skip this step and call a chimney company for help with a smoky fireplace. Even if you can light some pieces on your first attempt at starting a fire in the stove, it's probably best not to rely on that one load of damp or green wood for heat all day long. May 11, 2010 · Not all back-puffing issues can be traced to poor draft. Feb 15, 2016 · New homeowner, new wood burner. Sometimes it will blow open the bypass door. Back-puffing and creosote build-up in a stove indicate that the fire produces smoke faster than the chimney draft pulls it out of the stove.

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