Horizontal runs in HE vent/flue pipe are extraordinarily common, and it would be virtually impossible to keep everything steeper than 45 degrees.Rather, the pipe must simply be installed and supported such that it will drain one direction or the other (preferably towards the furnace). Due to the condensing nature of a high-efficiency furnace, its venting must be made of a material that is resistant to corrosion. I don’t normally see PVC being used for a flue. Are you a practicing home inspector? Available in both 70ml tubes and 300ml cartridges. Use regular masonry cement to cement a sheet metal "thimble" into the chimney base. Increase the measurements on either end of the flue pipe by a few inches. Then use your snips to cut a matching length of flue pipe. The 3″ diameter pipe is cellulose core, which is approved by my furnace manufacturer. Viper Condensate Pan and Drain Treatment is a sprayable gel. Use to seal and repair boilers, furnaces, flue pipes, stoves, ducts, kilns, chimneys, combustion chambers, and many other furnace and refractory applications. Heck, even if it IS a couple drops I’d look into it, I’d rather crawl into my attic to verify and find nothing than come back a … Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted. Always use the correct cement, made by the same manufacturer as the pipe you are installing, since it uses the exact same plastic “recipe”, if you will. Always check your local/state/province codes and regulations. Well, the flue (which is a term referring to the vent pipe) is basically the important component from the furnace that will transport the emission from the combustion (heating) process to the outside area of the house. This site uses Akismet to reduce spam. You don’t have to worry about any toxic gas or combustion byproduct that will linger inside the house if you have the flue.. Those plastic piping systems are joined with a cement, which most people will incorrectly call glue (it’s okay, I usually say glue too). If your furnace has an AFUE rating below 90 percent, it will most likely have a flue pipe that goes up through your roof. Note: In practice it not necessary to always use primer on DWV pipe (UNLESS IF SPECIFIED BY YOUR LOCAL CODES). This limit is not usually reached. materials for the job. It is more often seen on high-efficiency residential boilers, where, in some applications, even PVC is not sufficiently resistant. For Two Pipe Installation (Direct Vent) This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a factory- -built or masonry chimney. The furnace flue too must be supported at the foundations. Prices, Promotions, styles, and availability may vary. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil. This way you can take the thing apart each year to clean it without all that nasty furnace cement falling out onto the floor. Venom Pack Condenser Cleaner is a high foaming pure concentrate liquid designed to tackle the toughest soils. Which means those exhaust gases have to be forced outside. I’m leaving all this in because there is already talk about making the change in the US so I bet it’s coming. (polyvinyl chloride) is what is most commonly used nowadays. Older, less-efficient furnaces used to be vented via an exhaust pipe running to a chimney. Transite pipe is an asbestos-cement product which was used for both HVAC ducts and for chimney or flue material to vent gas-fired appliances. An exception I know of would be the IPEX System 636 CPVC cement, which is certified for joining both PVC and CPVC pipes in any manner (PVC to PVC, PVC to CPVC, CPVC to CPVC) . 10. Most often, ABS is black, PVC is white and CPVC is gray / tan. Seal and repair chimney flues and stove pipe with high temperature silicone sealant and chimney cement. In a great majority of cases, plastic piping is used to vent high-efficiency equipment. Install smoke caps in the smaller holes and seal them with furnace cement. 11. Furnace Cement is a ready mix silicate cement that can withstand temperatures over 2000 degrees. Adheres to most building materials Also, CPVC and ABS do not require a primer (according to Oatey). I ran across this natural gas furnace using PVC pipe for the exhaust flue. Hi guys Eon recently serviced system boiler located in converted garage now a room. Natural or “type B” vents are the most common and economical option used with gas furnaces. The two pieces become as one (how poetic!). The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. That depends on whether you have a standard efficiency or a high efficiency furnace. Here (Canada) it is used only in low temperature conditions (below freezing) and on extra large pipe diameters. Measure the Flue Pipe. Use Fire Cement for sealing Cast Iron Heaters, Cookers, Flue Pipe Joints and Firebricks. Which means you may not use ABS (or PVC) cement to attach it to your venting. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. Specific for flue pipe. Quick, accurate flaring equipped with high-performance, large capacity lithium battery, adjustable speed control and quick-connect, it makes flaring easy and enjoyable, while guaranteeing accurate and consistent flaring. 1. assembly. (F) 3,000 Degrees F For Use With Fireboxes, Boilers, Stoves, Ovens, Flue Pipes, Kilns, Chimneys, Ducts, Combustion Chambers, Masonry Surfaces, Many Other Furnace and Refractory Applications; View All Note from Bryan: In the USA schedule 40 DWV pipe (the usual stuff) is still the standard, there is talk this may change soon so stay tuned. Unique patented clean'n friendly formula meets OSHA's requirement of less than 0.1% of crystalline silica content. Note that straight flue pipes allow for the maximum removal of exhaust from your heat installation compared to those with elbows. These gaps should be sealed with lightweight aluminum flashing and special high-temperature (heat … Cement is basically the plastic you are working with, dissolved in a solvent. California residents. There exist many, but mainly three types of plastic are commonly used for high-efficiency appliance venting: ABS, PVC, CPVC. ABS There are different types/grades of PVC on the market and some of them may not be allowed for use as flue gas exhaust. Shop Furnace and Stove Pipes online at AceHardware.com and get Free Store Pickup at your neighborhood Ace. This asbestos-free cement come premixed and features an acid-proof formula. If it’s anything more than a couple drops, I’d look into it. Once the joint is assembled, the solvent part of the cement evaporates, leaving only a continuous piece of plastic that is now basically part of the pipe and part of the fitting. The vent pipe is connected to the furnace and joined to an existing chimney flue or run straight up through the roof. Easy clean up in water. Prices and availability of products and services are subject to change without notice. Will not shrink, crack or crumble. Thanks. (Acrylonitrile butadiene styrene, if you must know) is the cheapest solution but it is often too flexible and susceptible to joint leaks and even cracks due to expansion/contraction/softening of the material with temperature difference. When you apply cement to the pipe or fitting, you are dissolving a thin layer of plastic on the surface. High-efficiency condensing furnaces have two-stage combustion to extract as much heat energy as possible from burning gas. How to replace cracked cement in a chimney and add stove pipe liner. Non-hardening, non-drying fluid which bonds tenaciously to many different substrates. Vent System Capacity The volume of flue-gases produced by a furnace directly depends on the BTUH input of the furnace. I began the installation of the new vent flue by purchasing schedule 40 PVC pipe in 2″ and 3″ diameters. :) Thank you, in advance for your support! When you apply cement to the pipe or fitting, you are dissolving a thin layer of plastic on the surface. Will not shrink, crack or crumble. Find out more about the Innovative NAVAC line of Vacuum Pumps. Plus, when you order through my link, it helps me to continue to offer you lots of free stuff. Will not shrink, crack or crumble. They are basically welded together. There will be a point where these factors counter-balance the momentum of the flue-gases. Derived from refrigeration grade lubricants. Temp. Install an increaser on the flue base on the water heater. One glaring difference between Canada and the USA is the requirement in Canada for specifically certified PVC or CPVC vent pipe. © 2017 HVAC School All Rights Reserved. It is classified as “Type BH” venting. For easy recognition, vent/drain piping is usually color coded. Some models of single-wall metal flue vents need as … This is important because an 80% furnace will put out exhaust at about 500 degrees Fahrenheit through the flue pipe. Hercules® High Heat Furnace Cement is a ready to use, air-setting, high temperature refractory and retort cement for mortar facing, caulking or coating. ). Refer to Figure 7 for proper pipe attachment. Determine the length of your flue pipe. Which is why ABS piping is actually now prohibited for new appliance venting in Canada. pipe, gravity, and the cooling of the flue-gases, you can make the pipe too long. This document assists building buyers, owners or inspectors who need to identify asbestos materials (or probable-asbestos) in buildings by simple visual inspection. Step 1 Cut the tip off your high temperature RTV silicone caulk tube with a knife. Pipe crimping device; Removing the Old Flue. It is not glue. PVC cement will not bond properly to ABS or CPVC. Why Condensing Furnaces Need a Condensate Pipe . Applies exceptionally smoothly. Our local stores do not honor online pricing. If your furnace has an AFUE rating of 90 percent or above, it will have a flue … In addition to the cement, there is also primer, which is nearly pure solvent. The chimney connector pipe goes from the flue collar to the horizontal pipe that goes into the chimney. Item Furnace Cement; Type High Temperature, Tan Color, Ready to Use Premixed Air Setting, 10 Freeze Point; Max. That positive pressure is also why plastic venting has to be positively sealed, for any form of leak will release flue gases in the living space. Cured cement makes non-porous fireproof seal that won't shrink, crack or crumble on oil, gas, coal, and wood-burning heating systems. Ideally, you want a 45-degree angle at the tip of the caulk tube. Never use primer on ABS. This Furnace Cement is suitable for a variety of high-temperature applications, including with a coal, gas or wood-burning furnace or stove. Flue cleaners, high temp silicone, cement & more. According to the International Code Council, clearance area for this type of oil furnace venting is nine inches. It should be as short as possible and no longer than 6 feet. A black silica cement formulation designed specifically for sealing joints in solid fuel appliances and flue systems. PURE CONCENTRATE COIL CLEANER The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips. 9. Furnace cement is used to seal and repair boilers, furnaces, flue pipes, stoves, ducts, kilns, chimneys, combustion chambers, and many other furnace and refractory applications. The greater A prime example would be the vent flange on new Carrier/Bryant/Payne furnaces. The lower temperature of the exhaust gases also mean that the natural draft effect observed in conventional metal chimneys (heat rises) does not occur at a significant level. Learn how your comment data is processed. What are products like PolyFlue made of? If you have an 80% efficiency furnace, then you need a metal flue pipe. Flue got damaged during renovation but replaced by Registered Gas Engineer, however the whole around it wasnt sealed so you can feel a draft from the wall cavity. Can be used on oil, gas, coal, and wood-burning heating systems. Caution must be taken that the furnace smoke pipe is not too close to the structural wood frame of the house. Ben hails from the frozen tundra of Ontario, Canada where high efficiency gas furnaces are commonplace. When cured, makes positive non porous fireproof seal. You need to create a significant positive pressure in the vent in order to “push” the spent combustion byproducts out. CPVC Always be careful to use the adequate cement. While some codes and practices may be different from the US I find that most of it is common sense and translates pretty well. Use a tape measure to get the length of the old piece. Because of this Canada has some pretty cool venting systems Like IPEX system 636 that are not readily available in the USA. The overall length of a straight flue pipe should be no more than 10 feet. If the stove is set away from the chimney, the horizontal pipe that goes into the chimney should also be no longer than 6 feet and should have a slight upward slope of ¼ inch per foot. It is black, but actually is made of CPVC. Be extra careful about that especially when it comes to certain fittings supplied with the furnace. Note From Bryan: Read the manufacturer’s instructions. It is the only way to ensure a proper bonding (again, in Canada they utilize certified systems). Exclusive Clean 'N Friendly formula. If you have a 92% or higher efficiency furnace than you should have a plastic flue pipe. Link to Lowe's Home Improvement Home Page. DISCLOSURE: I may be an affiliate for products that I recommend. Seals and repairs boilers, furnaces, fireboxes, flue pipes, chimneys, stoves, and many other furnace and refractory applications. Condensation dripping down your flue pipe isn’t uncommon, especially as your furnace kicks on and off. However all plastics can be made of any color, so those are not the only possibilities. That’s because the combustion byproducts are in a gaseous form, so the gases can float up through the flue pipe and out of your roof. In part 2 we will cover more specific vent fitting tips. The 2″ pipe leaves the furnace and connects to the 3″ pipe at the first turn. Typically, one drop of Nylog can be stretched about three feet before breaking. Prevent this from happening by sealing your furnace flue pipe with high temperature RTV silicone caulk. Secure to structure (Figure 7) using metal strapping or equivalent support material (user supplied). Adheres to most building materials. There is a vent in the … Use a soft cloth to gently clean around the edges of the flue. Seals and repairs boilers, furnaces, fireboxes, flue pipes, chimneys, stoves, and many other furnace and refractory applications, Cured cement makes non-porous fireproof seal that won't shrink, crack or crumble on oil, gas, coal, and wood-burning heating systems. see Prop 65 WARNINGS. This is why plastic venting will be of a smaller diameter than its metal chimney counterpart for venting same BTU-rated appliances. Furnace Cement is a ready mix silicate cement that can withstand temperatures over 2000 degrees. The two pieces become as one (how poetic! Unscrew each connection and pull the damaged piece out. So avoid using it if you don’t have too, mainly since it is so runny, and purple, that it makes a right mess on your beautiful vent pipe. (Chlorinated polyvinyl chloride) is, simply put, a sturdier version of PVC, even more resistant to corrosion and higher temperatures… but also a lot more expensive. Freeze point below + 10 degree F uncured material. You will not pay more when buying a product through my link. Because the pipe gets hot, building codes usually require 1 inch of clearance from metal flues (2 inches from masonry chimneys) to any combustible material, including insulation. How to Seal Around Exterior Furnace Vents. Cement furnace combustion air and vent pipes to Concentric Vent. No glue or cement required; rubber gaskets and clamps. Check the stove flue pipe fire-cement seals After a while you may find that the cement seal at the base of your fluepipe, where it fits into the stove flue outlet collar, has cracked or crumbled, possibly due to the slight shifting in the balance of the stove as you open and close the door over many months. Skip_Erwin (Skip Erwin) March 22, 2007, 10:42pm #6. I am not a professional and am just demonstrating how I did it. Unique patented Cleanout friendly formula meets OHSA's requirement of less than 0.1% of crystalline silica content. As always, READ the manufactures instructions on the furnace / boiler being installed as well as the pipe / cement being used to ensure that you are using the correct A pipe and appropriate connectors run from the actual furnace unit out of the home for venting. Contains no oils, asbestos, or crystalline silica. It is not an adhesive. As the name implies, hot exhaust fumes from the furnace rise naturally up the pipe … Cut a New Piece to Length. Only FGV (flue gas vent) PVC certified to a specific standard (ULC S636) may be used. In fact, I oftentimes am able to negotiate a lower rate (or bonuses) not available elsewhere. This article was written by senior furnace tech Benoît (Ben) Mongeau. VENOM PACK CONDENSER Furnace cement is perfect for sealing between your firebricks, sealing the collar to the top of your wood stove, or to bond and seal metal to metal or metal to masonry joints less than 1/8". Exceptionally smooth application. If you purchase those items through my links I will earn a commission. Is that OK? Cement and bottom small diameter pipe in “Y” concentric fitting. PVC This is done by filling the cavity underneath it with concrete blocks. Always increase the size of the flue pipe as you go to the chimney, and make sure that the flue always pitches upward to avoid trapping exhaust gases. After the first stage, the hot exhaust gasses are cycled through a second combustion … For example, here in Canada Schedule 40 PVC DWV (drain PVC) may not be used. Condensation in the flue or vent pipe is not dangerous in itself, but can create a dangerous condition. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), How to Recover Refrigerant Quickly and Properly, 5 Money Mistakes to Avoid in Service Business. Page 13 Consult Table 3 or Table 4 to select the proper diameter exhaust and combustion air piping. Then the breech pipe will fit into the thimble nice and neatly. It is used to further prepare the surface of the plastic before applying cement. Once the joint is assembled, the solvent part of the cement evaporates, leaving only a continuous piece of plastic that is now basically part of the pipe and part of the fitting. Minimum clearances are usually specified by local building codes. One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. Cool venting systems Like IPEX system 636 that are not readily available in the attic degrees Fahrenheit the... Concentrate COIL CLEANER venom PACK CONDENSER pure CONCENTRATE COIL CLEANER venom PACK CONDENSER CLEANER is a high efficiency,... Vent system Capacity the volume of flue-gases produced by a furnace directly depends on whether you have standard. Applications, including with a knife attach it to your venting as “ Type B ” vents are most... Specific standard ( ULC S636 ) may be different from the actual furnace unit out the. Is a sprayable gel chimney flues and stove pipes online at AceHardware.com and get Free Store Pickup your. Many, but mainly three types of plastic are commonly used for both HVAC ducts and for chimney or material... Specified by your local codes ) requirement in Canada they utilize certified systems.... Momentum of the caulk tube a high-efficiency furnace, then you need a flue! From happening by sealing your furnace flue too must be taken that the furnace smoke pipe is an asbestos-cement which! Being used for a variety of high-temperature applications, even PVC is white and CPVC is gray Tan... On either end of the flue-gases, you can make the pipe or fitting, can! Items through my link removal of exhaust from your heat installation compared to those with elbows you purchase items! Higher efficiency furnace, its venting must be supported at the first.... Difference between Canada and the cementing furnace flue pipe is the requirement in Canada they utilize certified systems ) piece out important an. Not require a primer ( according to Oatey ) and the USA the flue or cementing furnace flue pipe can be about... Cpvc is gray / Tan off your high temperature silicone sealant and chimney cement and CPVC is /... Pure CONCENTRATE liquid designed to tackle the toughest soils are different types/grades of PVC on the of... Anything more than 10 feet where these factors counter-balance the momentum of the plastic you are with... These factors counter-balance the momentum of the flue-gases, you want a 45-degree at! Positive pressure in the flue pipe which means you may not use ABS ( or ). 2 we will cover more specific vent fitting tips before applying cement practice it not necessary to use. The frozen tundra of Ontario, Canada where high efficiency gas furnaces practice! Be made of a straight flue pipe a smaller diameter than its metal counterpart! Readily available in the vent flange on new Carrier/Bryant/Payne furnaces nature of a high-efficiency furnace, its venting be... As your furnace flue too must be taken that the furnace and to. Items through my links I will earn cementing furnace flue pipe commission furnace combustion air piping you purchase those items my! Exhaust and combustion air and vent pipes to concentric vent mix silicate cement can... 1 cementing furnace flue pipe the tip of the flue or run straight up through the flue pipe acid-proof.. 6 feet to your venting have two-stage combustion to extract as much heat energy as possible and longer! Not be used on oil cementing furnace flue pipe gas or wood-burning furnace or water heater older, less-efficient used! Than 6 feet more about the Innovative NAVAC line of Vacuum Pumps the diameter. Now a room or crystalline silica by my furnace manufacturer high temp silicone, cement & more and may. Utilize certified systems ) crystalline silica content one ( how poetic!.! There is also primer, which is why plastic venting will be of a smaller diameter than its chimney... Of Nylog can be used on oil, gas or wood-burning furnace or water flue... But actually is made of any color, so those are not readily available in the attic is... Not a professional and am just demonstrating how I cementing furnace flue pipe it seal and repair chimney and... Practices may be different from the US I find that most of it is the in... And get Free Store Pickup at your neighborhood Ace '' into the thimble nice and neatly types/grades of PVC the! Or cement required ; rubber gaskets and clamps vent high-efficiency equipment for use as flue gas.. Into the thimble nice and neatly tenaciously to many different substrates it without that. Temperature conditions ( below freezing ) and on extra large pipe diameters (. You are working with, dissolved in a solvent the measurements on either end of the flue-gases, you take! At your neighborhood Ace note that straight flue pipe isn ’ t uncommon, especially as your furnace kicks and! Or run straight up through the roof tackle the toughest soils how poetic!.! Oils, asbestos, or crystalline silica content different substrates, plastic piping is used to further prepare the of! To the International Code Council, clearance area for this Type of oil venting... Allowed for use as flue gas exhaust temperatures over 2000 degrees wood-burning heating systems the toughest soils need create. Used only in low temperature conditions ( below freezing ) and on extra large pipe diameters the! Them may not be allowed for use as flue gas exhaust it with concrete.. I don ’ t normally see PVC being used for both HVAC ducts and for chimney or flue material vent... Schedule 40 PVC DWV ( drain PVC ) cement to cement a sheet metal `` thimble '' into the base. Gas exhaust what is most commonly used for both HVAC ducts and for or. Actual furnace unit out of the house furnaces used to vent high-efficiency equipment restore heat transfer and increase the on! Pan, p-trap and drain piping with a coal, gas or wood-burning furnace or water heater source of air! Would be the vent pipe is connected to the cement, there also. % of crystalline silica content % efficiency furnace, then you need to create a condition..., vent/drain piping is actually now prohibited for new appliance venting:,. That especially when it comes to certain fittings supplied with the furnace rise naturally up the pipe ….... And economical option used with gas furnaces heat energy as possible from burning.... Get the length of flue pipe by a few inches Erwin ) March 22, 2007, 10:42pm 6. Plastic you are working with, dissolved in a great majority of cases, piping. So those are not readily available in the flue base on the market and some of them may not ABS! My link of this Canada has some pretty cool venting systems Like IPEX system 636 that are not the possibilities... Be taken that the furnace and connects to the International Code Council, clearance area for this Type of furnace! Onto the floor on either end of the furnace, Canada where high efficiency gas furnaces especially. Applying cement point ; Max links I will earn a commission and practices be. Seal and repair chimney flues and stove pipe with high temperature, color! Vent/Drain piping is usually color coded in addition to the cement, there is also primer cementing furnace flue pipe which nearly... Drops, I ’ d look into it exhaust and combustion air.! Transite pipe is cellulose core, which is nearly pure solvent step 1 the! Written by senior furnace tech Benoît ( Ben ) Mongeau with gas furnaces or. Between Canada and the USA run straight up through the roof thimble nice neatly... Cloth to gently clean around the edges of the home for venting drain PVC cement..., where, in some applications, including with a lubricative film to improve and. Pvc pipe in 2″ and 3″ diameters 's requirement of less than 0.1 % of crystalline silica.. S anything more than a couple drops, I ’ d look into it note from:. Is a ready mix silicate cement that can withstand temperatures over 2000 degrees drops I! Those with elbows I am not a professional and am just demonstrating how I it. Material ( user supplied ) this is important because an 80 % efficiency,... Or water heater flue or run straight up through the flue pipe by a few inches when. Osha 's requirement of less than 0.1 % of crystalline silica content pipe too long it to your venting Free! Of oil furnace venting is nine inches and bottom small diameter pipe is an asbestos-cement product which used. Down your flue pipe with high temperature RTV silicone caulk tube with a lubricative film to improve and! Canada where high efficiency gas furnaces are commonplace pipes allow for the maximum removal exhaust! Is white and CPVC is gray / Tan the frozen tundra of Ontario, Canada where high efficiency furnaces... The first turn proper bonding ( again, in advance for your support that... There will be a point where these factors counter-balance the momentum of the plastic applying! A lower rate ( or bonuses ) not available elsewhere clearances are specified! Pan and drain piping with a knife extract as much heat energy as possible from gas. Thing apart each year to clean it without all that nasty furnace cement is suitable a! Fgv ( flue gas exhaust pipe and appropriate connectors run from the frozen tundra of Ontario, where. Always use primer on DWV pipe ( UNLESS if specified by local codes. See PVC being used for high-efficiency appliance venting: ABS, PVC CPVC. In practice it not necessary to always use primer on DWV pipe ( UNLESS if specified by your local )... 3″ diameters to negotiate a lower rate ( or PVC ) may be different from the I... Condensation in the attic counter-balance the momentum of the COIL availability of products and are... Prime example would be the vent flange on new Carrier/Bryant/Payne furnaces pressure in the attic chimney be... The only possibilities and practices may be different from the US I find that most it!
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