He also said this was a city code issue as well. Watch out: also Important are the heating appliance manufacturer's installation instructions what size flu do we need. What would a correct clay flu liner size should I use? New York 1984 Uniform Fire David I don't quite understand the question. I'm burning bituminous coal get smoke billowing out the door when I open it even though I have lots of draft. It may also be possible to simply make some careful draft measurement under various conditions (heater in use, various outdoor & flue temperatures & wind conditions) that can support the design. When you have an insulated chimney liner, this risk is nearly diminished. In some houses it may be possible to install the Wood burner flue through a wall. Thank you for your help! Improper gas burner orifices - set perhaps for the wrong fuel, such as mixing LPG and Natural gas set-up procedures ( this could be your trouble), or an improper pressure regulator setting, or improper burner adjustment. Home; Trade login; My Account; Recent Orders; Total: My Cart. In the United States, they are also known as vents for boilers and as breeching for water heaters and modern furnaces. He will come out at some point to adjust the draft if needed. [8] National Fuel Gas Code, an American National Standard, 4th ed. calculation using a 38,000 BTU water heater with a 3" draft hood and a 37,500 Prevention and Building Code, Article 10, Heating, Ventilating, and Air Conditioning Requirements. The size of the stove collar does not … Flue vent connectors and their materials, sizing requirements, & fire clearances are at FLUE VENT CONNECTORS, HEATING EQUIPMENT. For open fires with a standard opening up to 500mm x 550mm, the minimum required flue diameter is 200mm round or 175mm square. BTU boiler with a 4" draft hood connected to a 20' high chimney is to use a Flue liner brushes are threaded one end and are specially designed using short stem soft bristle with effective sweeping of flexible flue liners in mind. Well, the most important thing to remember is that the flue size must never be smaller than the size of the stove outlet. Among the obvious are. For example, if the collar measures 6″ in diameter you’ll need to run [6″ stovepipe] (http://www.northlineexpress.com/chimney/chimney-pipe-stove-pipe/stove-pipe/6-inch-black-stove-pipe.html "6" stovepipe"). But before you can think about how great it will look roaring away in the background on a cold winter’s evening, there are some important questions that need answering, and one of the most commonly asked is     “what size flue pipe do I need?”. He said that the flue pipe is correctly sized inside the attic (6") but on top of the roof it is connected to a 4" dryer vent pipe and we need a flue pipe that is 6" and made for venting the furnace. NN7 2HF, Free delivery to UK mainland only. 30 foot masonry chimney in this outdoor temperature range can vent 445,000 input BTUHa 113 sq. flue liner was listed in the One and Two Family Dwelling Code for New See CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_D. ANSI Z223.1-1988 - NFPA 54-1988. So if a stove manufacturer states that the stove requires a flue diameter of 7″, then a 7″ liner must be fitted. AnonRatio of fireplace opening Dimension to chimney flue sizeA reasonable rule of thumb giveing the ratio of fireplace opening size to the cross-sectional area of the fireplace flue vent opening is 10 to 1. The size of a flue pipe is determined by the distance from the heater to the termination point of the flue. Again not an issue though see the sketch below. So just do the calculation of square inches of your fireplace opening and take one tenth of that and you'll be in the right ballpark for the chimney flue dinensions.Keep in mind that a number of other important factors will affect the chimney draft and will make your fireplace work well or note such as availability of outdoor combustion air and the proper cake of the fireplace itself as well as the throat and chimney to follow the description of the Rumford fireplace figured out revolutionary times. The size of the stove is normally the first thing to consider when buying a stove. So as your chimney is in between those two and even the smaller internal size chimney can vent more BTUH than you are connecting the chimney itself meets the standards as I read them. See CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_E. previous examples. But in general the chimney venting requirements are set by the fuel type and the BTU rating of the appliance. 11 Forest Road It is possible to get a rough idea of the size you need using the age of your property, insulation levels and the size of your property. Well, making sure that you choose the right venting style will protect them. [Note: pending clarification, we have not provided excerpts of Table C-9-G because, frankly, some of its data is confusing. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. For example, if it has a 6" opening where the pipe is to be inserted, that is the ideal size liner you need. Mary:Thank you for a helpful question: how do I get the required size for the flue vent connector that vents two or more heating appliances into my masonry chimney?To get the correct chimney size (or to see the limitations of what your 8x8" chimney can possibly vent in BTUs, see What happens when your flue is too cold? The Building Regulations require that the minimum flue size for stoves are as follows: Up to 20kW burning smokeless fuel - minimum 125mm diameter. I'd want to know 1. what's being vented and is the 3" vent adequate in the first place. We have no relationship with advertisers, products, or services discussed at this website. combustion system central furnaces. Building and Fire Prevention Code: [12] "Top Ten Chimney (and related) Problems Encountered by One Chimney Sweep," Hudson Valley ASHI education seminar, 3 January 2000, contributed by Bob Hansen, ASHI. We are located just off junction 5 of the M40, Stokenchurch. CHIMNEY FLUE SIZE SPECIFICATIONS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. It can be larger but must never be smaller or leaks will result. Not shown anyway in our table (I'll add some data) is that per the AGA NFPA code, if I assume the horizontal flue vent connector distance is 10 feet or less and the chimney height is 30 feet. Permission may also depend on the chimney type and design. when 2 gas appliances are vented through category 1 single wall galv. I want to purchase a new boiler to heat both sides which I have zoned. If, … If your clearance is less than 18’’ you will have to use double wall stove pipe. Safety issues aside for a moment there can be draft control and operating difficulties - any solution has to prevent automatic draft from one appliance from fouling up the other. We include excerpts from UMC tables along with additional commentary to assist in sizing metal or masonry chimneys according to chimney diameter, height, materials, and the input BTUH of the appliance(s) to be vented. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. This two-part table gives the chimney specifications for the total input BTUH of all of the appliances combined and joined into a single vent when the flue is a masonry chimney and when the flue vent connector (between the appliance and the chimney entry point) is a single wall metal component. Depending on what kind of stove pipe you use, the Class A chimney pipe must come into the room six inches (for connecting to double-wall stove pipe) or 18 inches (for connecting to single-wall stove pipe). [6] NFPA # 54-7.1 1992 - We have all these pipe sizes covered and everything in-between! refers to Chapters 23, 29, and 37 of the Building Code. The chimney is about 30 feet high. duct to a 8x8 clay tile flue, On 2020-02-28 - by (mod) - smaller flue ok for some heating systems. At the very least you need to have a trained service technician inspect, measure, and if necessary adjust the draft and draft regulator for your old Weil Mclain heater. My chimney (30 ft tall) has a stainless 6 " liner but the new furnace outlet is 7". You can use a 5” diameter flue liner if you have a DEFRA approved stove and the manufacturer clearly states this is compatible. While the correct size flue is of course extremely important, there are many other factors you need to consider prior to the installation of your stove, such as insulation, chimney position, bends, connection, pots and   terminals. Apologies for the delay. Will this reduction affect anything? "My coal boiler and oil boiler vent into the same chimney. - follow those Watch out: your 8x8" clay flue tiles forming the actual masonry chimney flue also set a limit on the total input BTUH that the chimney itself can handle - again affected by height and other factors.More helpful chimney and flue vent connector sizing articles are suggested above on this page and in the ARTICLE INDEXHerewith I attach an excerpt from CHIMNEY FLUE SIZE SPECIFICATIONS TABLE C-9-F that gives sizing for flue vent connectors. It looks to me like the coal boiler's input was changed when the 6" square clay liner was installed. The size of the stove is normally rated by kilowatt output (kW) or in BTU’s, which enables us to understand the amount of heat the stove produces per hour. A flue vent connector is the horizontal/sloped metal pipe connecting the heating appliance to the entry point of the chimney. If you search this website for a Rumford fireplace you'll find more details. An additional table, the Continuation of C-9-D gives the chimney specifications for the total input BTUH of all of the appliances, combined. As a general rule, the diameter of the chimney should match the flue collar on your wood stove. The conversion must only be carried out by an authorised gas engineer. This measurement is usually between 8 … Chimney & flue sizing tables by type, BTUH, building codes, and other factor: This article series describes the size requirements for chimney flues for different categories of heating appliances. The effective square inches of venting area, translated to an equivalent round flue, would be less - or aboutd 42.7 square inches. We have insulation sizes to suit all types of copper pipe sizes. Wire bristle chimney brushes are most commonly used and generally do a great job, but are not recommended for metal chimney flues. common flue with an area of 28 square inches or a 6" flue vs a 5" flue in the Assuming that the connection can be made safely between the different chimney diameters and materials, and that the above-roof height is just a few feet, that may be ok. My concern is that changes in diameter of a flue have impact on the draft. If we are venting multiple appliances into a single chimney flue we use Table C-9-F(two part table) in the article above. Some models of single-wall metal flue vents need … (Sept 9, 2011) Graham said:What is the standard height above a tiled roof to the top of chimney ? - Ed. (Aug 30, 2011) david said:what if you had a 4" furnace outlet and 2 3" outlets. 30 foot masonry chimney in this temperature range can vent 485,000 input BTUH. Just muliplying these dimensions together (6.75 x 6.75) = 45.56 sq.in. There are also assumptions about outdoor temperatures that affect the chimney draft conditions. USMA - Sept. 2008. What size of chimney or flue do I need for burning solid fuel? 2. ". Burning coal, coke or wood in an open fireplace requires a chimney or flue with a minimum internal diameter of 200mm (8 inches) and constructed of a material specifically suitable for solid fuel. From this pipe, you can connect to either flexible flue liner if going directly through an existing chimner, or to twin wall flue pipe if you need to pass through a wall or ceiling or route your flue pipe externally. The coal boiler enters below the oil boiler and on the opposite side of the chimney. These are typically measured in metric sizes (in mm). Up to 30kW burning any fuel - minimum 150mm diameter. or ALL of this discussion would be nonsense since there could be very unsafe conditions, even fatal ones, present). in. [11] New York 1979 Uniform Fire Prevention & Building Code, The "requirement" for 8" of solid masonry OR for use of a It's not just stove pipe size you need to consider, but proper fire-rating of the flue or chimney materials, clearances from combustibles, cleanout access and code. in. Give us a call today and we'll be happy to discuss. Improper ceramic log positioning could also cause improper gas flame. CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_D, CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_E, CHIMNEY FLUE SIZE SPECIFICATIONS TABLE C-9-F, CHIMNEY FLUE SIZE SPECIFICATIONS TABLE 504.2, Rais QTEE-II gas stove for which you can read the RAIS QTEE GAS STOVE MANUAL, CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_B, CHIMNEY FLUE SIZE SPECIFICATIONS_TABLES C9_C, InspectAPedia.com/chimneys/Chimney_Inspection_Repair.php, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, Minimum Input BTUH, Single appliance, natural gas, B-vent connector vs chimney height, size, & outdoor temperature. How many offsets will there be? After that, add any height needed above the chimney chase for a storm collar and chimney cap. the additional flue outlet. NFPA 1992 (7.5.3) states that draft hood appliances, Category I The general rule is as follows: For a stove of up to 20kW a minimum of 6” diameter flue is needed. The pipe you purchase should match the inside diameter of the hole. If it is a 3-inch-diameter pipe, the inside cross sectional area of the chimney flue liner should not exceed 49 square inches. See CHIMNEY CROSS SECTION SHAPE EFFECTS for the effects of square vs round chimney sectional areas. Property ages are given across the top and they assume standard insulation measures, such as double glazing and loft insulation, have been made. Or perhaps you have an industrial oil or maritime application that requires lagging. There are several other factors responsible for chimney flue size; chimney placement, height, lateral length of the vent pipe, type of the vent pipe, number and type of the connectors along the entire chimney flue run, size and category of the vented appliances… Be sure to obtain the latest edition. "Inlet pressure" and ”Burner pressure” must ALWAYS be measured. Let me know what the tech finds. If the exhaust pipe is 4 inches in diameter, the flue liner cross sectional area should not … How to Measure the Diameter of a Masonry Chimney: For masonry chimneys you'll need to measure the inner flue liner dimensions both directions. You don't give the horizontal distances of your 7" flue vent connector(s) between the appliances and the chimney, nor do you say if the appliances are natural draft or forced draft, so we don't have the total answer to your question, nor am I confident commenting on "safety" for an unknown system since a mistake can be fatal. Aside from the fact that you don’t need to worry about trapped toxic gas, you don’t have to worry about fire. How to Tell When You Need a Chimney Liner . If you're looking for more information on flue pipes, or a potential stove that you may be interested in. Most wood burning stoves are top-vent models, meaning the flue collar will be on top of … Note: this document is reissued every four years. This would put about 16" of rise on the coal boiler's smoke pipe. Yes, Flue, going to a smaller diameter main flue in a chimney may reduce the draft. For larger open fires like Inglenooks which operate with a fire opening greater than 500mm x 550mm, the flue size should be at least 15% of the free unobstructed area (including the sides if open). A pellet stove needs only a 4 inch pipe. It’ll force the smoke back into your home because the cold air is more dense. 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. No, they aren’t! Historically the term flue meant the chimney itself. I also have a gas hot water heater on the same flue in a "y" connection. In most cases, a step up is also fine. we have a fireplace opening 5feet wide and 30 inches high . I stuck 2 old elbows in to prove to myself that I have room to rearrange the pipe, you can see them in the pic. The recommended minimum diameters for stoves is as follows: up to 20kW burning smokeless fuel - Minimum 125mm diameter. (Jan 27, 2014) (mod) said:Bill, I am re-posting your question without the imbedded hyperlink - our system doesn't permit links in comments for reasons of security. (Apr 2, 2014) sal avanzato said:my chimeney [30ft tall] has8"x13"terracotta flue liner with 7" round terracotta crock going into the flue liner. It would be best if you let a trained professional install this for you. Hartwell Can I safely reduce the outlet from 7" to 6" ? York, in 1979, in Chapter 9, Chimneys and Fireplaces, New York 1979 A pipe and appropriate connectors run from the actual furnace unit out of the home for venting. first question-what is the proper gauge for this application and secondly, what size duct do i use as common pipe after wye junction? This pipe gets super hot, so it you use single wall stove pipe you'll need to keep it at least 18 inches away from walls, drapes or anything combustible. A. Regarding the question below, the oil tech said that it should be OK for our setup. What type gas are you using? The average stove and furnace today requires a 3 inch diameter pipe, but can go as large as 8 inches. The stove is supplied configured for natural gas or Propane gas but can be converted. When we are talking about gas furnace vent pipe code, we need to talk about the different types of the vents first. Now you need to calculate the effective length of your pipe run. Thanks to Luke Barnes for suggesting that we add text regarding the hazards of shared chimney flues. Use conversion kit with article number 3713595 NG to LPG or 3713596 LPG to NG. I don't have any room to go higher. 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. Buy a brush that is at least as big as your chimney liner otherwise it will not reach the side walls of your chimney and won't do an adequate job. Simply measure the distance from the top of the "as installed" appliance flue collar to the "as built" height of the chimney chase. You need at least one length of stove pipe to connect directly to your log burner’s flue outlet. I never use both at the same time. But chimney experts and draft measurements show that in a rectangular flue not all of the cross-sectional area is equally effective in developing draft. ], On 2020-09-30 by (mod) - Determine the size for the flue vent connector that vents two or more heating appliances to the chimney. Venting a Wood Stove. Discovering what size pipe to buy is simple. 1kW = 3400 BTU’s. Jerry, I can't say, but you might find the information you need in your woodstove's installation manual where the manufacturer will specify the minimum flue size for your particular stove. So when calculating the venting capacity of a square or rectangular clay chimney flue tile or liner by looking at its cross section, we use the UMC's Table C9-G of "round chimney flue equivalents" to get the effective chimney flue vent cross sectional area before we enter the masonry chimney BTUH venting capacity tables 6-9-C (single wall flue vent connectors and single heating appliances) or 6-9-F (single wall flue vent connectors and multiple appliances). Types of metal chimneys and their properties and fire clearances are at METAL CHIMNEYS & FLUES. Single walled enamelled stove pipe should only be used internally. For open fires with a standard opening up to 500mm x 550mm, the minimum required flue   diameter is 200mm round or 175mm square. what are the vertical dimension involved and what will be the draft impact.I would give a call to the manufacturer of the metal flue you're using to ask their opinion. Here is a quick guide to the UMC's chimney sizing & BTUH venting capacity tables when sizing a metal or masonry chimney diameter to match the total input BTUH of the heating appliances (boiler, furnace, water heater) being vented. [9] Fire Inspector Guidebook, A Correlation of Fire Safety Requirements Contained in the 1987 BOCA National Codes, (newer edition available), Building Officials and Code Administrators International, Inc. (BOCA), Country Club HIlls, IL 60478 312-799-2300 4th ed. The 1992 GAMA vent sizing tables for single-wall metal vent connectors Metal B-Vent Chimney (Vent) Type of Flue Vent Connector:1, 1. A gas wall heater or older forced-air furnace generally requires a type "B" double wall metal vent pipe, while a new high-efficiency furnace requires a schedule 40 PVC vent pipe. You might find draft conflicts (can't optimize for both appliances), fire hazards (one heater igniting deposits from the other), code violations, and fire spread safety hazards. "Rooftop View Turns to Darkness," Martine Costello, Josh Kovner, New Haven Register, 12 May 1992 p. 11: Catherine Murphy was sunning on a building roof when a chimney collapsed; she fell into and was trapped inside the chimney until rescued by emergency workers. The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. For example, you could vent a 6-inch stove into an insulated chimney that is 8 inches in diameter. Get this inspecting and testing done soon since leaving a heater working improperly (if it is) can lead to unsafe operation. Calculating Your Pellet Stove Venting Size. Stove manufacturers determine the appropriate size of the connecting flue pipe to ensure that their stove will work safely and efficiently and therefore the flue liner should be no smaller than the size of the flue pipe aperture. Note that different chimney sizes are required for venting fireplaces and woodstoves. A stove having a five inch collar (to fit a 5″ pipe) does not necessarily mean that a 5″ chimney liner can be used. Will any other appliances flue pipe be tying into this one? My question is that my looad calculation calls for a 136,000 btu furnace, in this range I'm looking at a 142,000 furnace. With the use of an increaser / reducer, according to the safety codes, you may be able to go up or down one size and your unit should still function appropriately. For example an 8" x 8" square nominal clay chimney flue tile liner has inside dimensions of 6 3/4" x 6 3/4". Im putting it in my shop.The heater does not have a pipe collar .It has a 7 x 8 inch opening where i can put a collar.I dont know what size to put 6 inch or 8 inch? This is normally when the stove is to be situated against an outside wall. Are those numbers sufficient for calculating you chimney flue size / diameter? I don't know. (Oct 13, 2012) Brent said:I have a single 2650 sq ft home that was once subdivided, one side had a 133,000 btu oil boiler and I have a 115,000 gas boiler. I'm going to install a clay lined brick chimney in my 2 story home for a wood burning stove! The rule of thumb for sizing a chimney liner is that you never want it to be smaller than the appliance exhaust hole and you don't want the liner to be three times the area of the exhaust hole of the appliance. Your chimney cross section area is 8 x 13" = 104 sq.in. Good question, Charles. Specific to venting of equipment with fan-assisted combustion systems. The maximum allowed horizontal run of the vent pipe is usually four feet. The conversion kit’s contains 4 new nozzles.The stove is preset to provide the correct amount of heat (kW) as described under specifications. Twin wall flue pipe (also known as chimney flue or insulated flue) is a type of flue system used when a traditional chimney stack is not available. Measure the hole where the furnace vents. On 2020-02-22 - by (mod) - what causes a direct vent Rais propane stove to over fire? There is a knock out cemented over that I can use, I would just have to cut an opening into the clay liner. For larger open fires like Inglenooks which operate with a fire opening greater than 500mm x 550mm, the flue size should be at least 15% of the free unobstructed area (including the sides if open). 150mm (6 inch) Buy Online, Call, or Collect. I have a 30 yr old oil furnace (Weil Mclain) with a 7 inch flue going into chimney. However, the interior of your chimney (especially after insulating) may not have the adequate space. - additional instructions are on p. 53 Watch out: if this is not your Rais stove model then of course you need to follow the instructions for your specific stove. The result of those After all, you want to keep your family safe from harm. The size of your flue vent connector or "flue pipe" needed depends on several variables including: - the size and input BTUH of each of the appliances being vented At the start of the article above we give some help choosing which tables to use to answer chimney questions. flue area not less than the area of the largest vent outlet plus 50% of the area of A 6-inch stove requires a 6-inch flue. Northants There is no need for further adjustment. On 2016-04-17 - by (mod) - Can a 3" metal flue exhaust into a 6" flue at the roof? A liner must never be of a lesser diameter than the flue size requirement stated by the manufacturer. Do you think this alternate piping might make an improvement? Watch out: But keep in mind that most likely you need to obtain a building permit and inspections for installing any new heater anywhere - don't view that as a stumbling block but rather as an extra inspection that might help avoid a fire. The venting capacity of a rectangular or square masonry flue, if translated directly into actual or measured square inches of cross section, is less than a round chimney flue of the same square inches of venting capacity. Watch out: Check with your local building code officials for local building code requirements when designing, building, or installing chimneys and vents. According to the International Code Council, clearance area for this type of oil furnace venting is nine inches. Too small OR too large a flue can make venting difficult and even unsafe2. For burning coal, coke or wood in a stove, the size of the chimney or flue required will be dependant on the stove choice. Adding about outdoor chimney temperatures vs. working chimney height, there is a second concern that in cold conditions it is more difficult to get draft working in a taller exterior masonry chimney since the flue gas from the appliance has to overcome the weight of a tall column of cold air. The maximum vertical run of three inch pipe is usually fifteen feet. Before thinking about sharing a chimney flue - generally prohibited as a safety concern but permitted in some jurisdictions, particularly with gas and oil fuels provided proper venting arrangement - I'd check with your local building department about what they permit. The Right Size Flue Pipe. Can a 3" metal flue exhaust into a 6" flue at the roof? attached to a tile lined masonry chimney uses Table 8. BTU Color Coding Note: in the tables below we use colors to indicate where an example-approximate appliance BTUH vent capacity rating falls across various chimney parameter combinations. Some building codes require a distance of 36 inches. Anon I'm sure there are a number of installation, adjustment or maintenance defects that can cause a propane stove to over-fire, and that there are specific defects and serious safety issues that are specific stove type, brand, and model dependent. The UMC Appendix C Table C9-G, "Masonry Chimney Liner Dimensions with Circular Equivalents" translates square or rectangular chimney flue inside dimensions into an equivalent "round" flue diameter and into equivalent square inches of venting capacity. CHIMNEY FLUE SIZE SPECIFICATIONS TABLE C-9-F To avoid confusion, we call the vertical venting system the "chimney"The (roughly-horizontal but actually sloped "up") metal "pipe" that connects one or more heating appliances to the entry thimble in the masonry chimney is called aflue vent connector - typically single wall metal, 24-gauge steel -Notice that ultimately the maximum size of your masonry chimney is 8x8 or 64 sq.in.The size of your flue vent connector or "flue pipe" needed depends on several variables including:- the size and input BTUH of each of the appliances being vented- the size of the flue-vent connector on each of those appliances (this will be the bare minimum and is typically the size of the vertical flue vent connector between the appliance and the horizontal flue vent connector that continues on into the chimney thimble or point of entry)- The length of horizontal run- The slope of horizontal run, To get the correct flue vent connector size when venting multiple appliances into a single chimney or flue, see CHIMNEY FLUE SIZE SPECIFICATIONS_TABLE_C_9_E. Login ; my Account ; Recent Orders ; total: my Cart point to adjust the draft a 6?... Gives the chimney venting requirements are at fireplaces & HEARTHS appliance is a out... This website for a Rumford fireplace you 'll find more details temperatures affect. General rule, the diameter of 7″, then a 7″ liner must be fitted must! Are vented through category 1 single wall galv Rais propane stove to fire. May be interested in three inch pipe `` y '' connection '' to 6 '' clay. The roof my looad calculation calls for a wood burning stove duct do I need to to... Table, the oil tech said that it should be ok for setup... The oil boiler vent into the same flue in a chimney what size flue pipe do i need reduce the draft needed. '' above the oil tech said that it should be ok for our setup increases the effective length of pipe! Directly to your log burner ’ s flue outlet, Ventilating, and air Conditioning requirements Inlet... It ’ ll force the smoke back into your home because the cold air more... Today requires a 3 '' venting into 6 '' flue at the roof need at least length... Fuel gas Code, article 10, heating, Ventilating, and 37 of chimney. 10 ] Uniform Mechanical Code - UMC 1991, Sec 913 ( a )! Vs round chimney sectional areas may reduce the draft if needed the manufacturer clearly states this is when. ; Recent Orders ; total: my Cart opposite side of the pipe you purchase should match flue... Under specifications NG to LPG or 3713596 LPG to NG clay lined brick in... About 16 '' of rise on the chimney should what size flue pipe do i need the flue liner cross sectional area should not 49... Looking at a 142,000 furnace '' venting into 6 '' is quite an increase venting into 6 flue..., & fire clearances are at fireplaces & HEARTHS, some of its data confusing! Wire bristle chimney brushes wire, flat wire, flat wire, wire. No rise to the appliance but can be converted to calculate the effective of... A 78 sq 1992 GAMA vent sizing tables for single-wall metal vent connectors, heating, Ventilating and. These pipe sizes 20kW burning smokeless fuel - minimum 150mm diameter states that the flue size specifications 504.2. ( 6.75 x 6.75 ) = 45.56 sq.in outlet from 7 '' flue diameter of 7″, a. 7″, then a 7″ liner must never be smaller or leaks will result flue exhaust into a in. 4Th ed or 3713596 LPG to NG 5 ” diameter flue liner cross sectional area should not … 2 small. Ok for our setup david said: what if you search this website determined by the exhaust pipe leaving hot! This discussion would be nonsense since there could be very unsafe conditions, even ones! Alternate piping might make an improvement chimney size requirements are set by the fuel and... Connected them with a 6 in diameter and connected them with a 7 inch flue into! And modern furnaces a tiled roof to the International Code Council, clearance area for this type of furnace... Pending clarification, we have no relationship with advertisers, products, or see complete!

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