Using a "Heat Shield" on a single wall stovepipe allows you to reduce the clearances from 18" to 6" to the wall and 9" to the ceiling. Question. Some local codes require you to use only the kind of pipe listed in your owner's manual for your unit. If anything in your manual is unclear or confusing, contact the manufacturer of your appliance directly for clarification. Chimney Liner. Once you pick a brand and a size you have to stay with that for the entire install. A direct vent system can be terminated either horizontally or vertically, and in some cases, it may only take a few inches of pipe directly out the back of a direct vent appliance to the outside of your home. The specifications for venting for each appliance will be spelled out in your owner's manual. I prefer when possible to run the pellet vent all the way through the class A if it's a straight run. Is it acceptable to reduce the width of the thimble using a tin cutter to match the width of the wall? Most woodburning fireplace inserts require a 6" diameter stainless steel chimney liner. Class A chimney pipe is UL-listed, which permits its use with a range of different vent pipe manufactured by other fabricators and an even wider variety of fireplaces, stoves, inserts, and furnaces. Type B pipe is becoming less prevalent for venting hearth products, but many furnaces and water heaters still use it. How many square inches need to be around the pipe in a chase and what is the minimum size of a chase for a 6 pipe? 20 years for class A pipe is a fairly conservative estimate for lifespan, but that certainly holds true for some applications. This is why you must convert from stove pipe to class A chimney pipe when venting your wood burning stove. mike, yes you can use zinc covered hvac pipe for your wood stove. Gas Vent for Direct Vent Units. Unlike our other review sections (e.g. Double wall stove pipe, on the other hand, requires only 8 inches of clearance from the ceiling and 6 inches from a wall. Please note that this code must be met with the 10-foot radius, clear of any obstruction at the top of your pipe before your cap is installed. wood stoves). Some direct-vent stoves are rear-vent models and able to vent horizontally from the flue collar to the wall. Be sure to follow your manufacturer's guidelines for maximum horizontal run, vertical rise, etc. A transition from black stovepipe to solid-insulated class A chimney is required prior to the vent run exiting through any wall from where the stove is located, so this would not be possible. Type B pipe is never suitable to be used with wood-burning or coal-burning appliances. Therefore, it is never safe to use only stove pipe for venting. We hope this guide has been helpful and informative. Tyler M. - NFI Master Hearth Professional, DuraVent DVL 6-Inch Double-Wall Stovepipe to Stove Flue Adaptor, How to Find the Right Contractor to Install Your Hearth Appliance, EPA Emissions Guidelines and the Future of Wood Burning Stoves and Fireplaces, How to Decorate Your Fireplace for Christmas, Selecting the Right Gas Log Options and Accessories, California Title 24: Complete Guide To Net Zero Energy, The Caframo Ecofan: Your One-Stop Comprehensive Guide. We carry high quality Simpson PelletVent Pro products to ensure your pipe is high quality and long-lasting. When dealing with offsets with stove pipe and direct vent pipe, you can offset to go around an obstruction for up to nearly 60 inches for stove pipe and nearly 40 inches for the direct vent pipe. It is best to use the appropriate pipe as listed by the manufacturer for the specific model you are venting. A thimble is designed to allow Class A chimney pipe to pass through the wall, run into the room where your appliance is installed, and then connect to the stove pipe. An 18 inch clearance to combustibles is required and these pipes feature an unheard of fume-free finish. In this case you will need to go from the 4 inch chimney liner tee down to 3 inch. So I can't use class-a pipe to go through my finished (insulted, etc.) How does a 6-inch black slide pipe attach to the bottom of class A chimney pipe? In addition to your pipe and chimney/termination cap, here are several chimney components you may need for your installation. Through-the-ceiling — For venting systems that run vertically through a ceiling, you must have a ceiling support box or round ceiling support piece to use as your transition point from the stove pipe to the Class A chimney pipe. You may want to consult with the manufacturer and your building inspector. The owner's manual of every direct vent fireplace, stove, or insert will specify which brands of direct vent pipe are approved for use with that unit. What we have here is a guide to help you, the consumer, become a bit more familiar with chimney pipe. Product Rating is 5. Trying to figure out what kind of piping you need to install your fireplace, stove, or any other hearth appliance can be an intimidating task. For wood stoves, you should use a solid-pack insulated stainless steel class A chimney system. Manufactured wood stove pipe, classified as Class A pipe, usually comes in 6 inch, 7 inch, and 8 inch diameters. Most B-Vent pipe has a one-inch clearance to combustibles. SKU: 3PVP ... Browse below to find the length of vent pipe you need for your pellet stove. I had an older pellet stove that I originally installed a vent kit out of my house vertically. Some older wood burning stoves are rear vent models. Class A pipe is usually manufactured with either a stainless steel or galvanized (or galvalume) outer wall. There are two types of Class A chimney pipe: When using Class A chimney pipe, it is important to plan or route the vent run wisely to minimize costs and maximize your savings. Stove pipe is used for venting wood burning stoves and is only for use inside the home, or more specifically, inside the room where the stove is installed. Approaching his 10-year work anniversary, Collin is one of our National Fireplace Institute (NFI) certified technicians and content manager for the eFireplacestore, eCanopy, and EliteDeals brands. shop wall and then, when outside, convert to stainless single wall pipe to the cap on the roof? Once these clearances are met, you must convert your stove pipe to Class A chimney pipe for proper venting of your stove. I have a fireplace insert I want to put into a brick fireplace. Instead, the clay thimble would need to be removed and replaced with a section of horizontally-positioned chimney with a finishing collar that would connect to black stovepipe on the interior of the home. These include through-the-ceiling or through-the-wall venting methods. What type of pipe, insulated or air-cooled, do you think would be best for use with a Mansfield hearthstone soapstone wood stove? For example, a single wall stove pipe requires 18 inches of clearance from ceilings or walls. Also, it should never be used as a free-standing exhaust pipe for high-temperature venting. Remember, it cannot be stressed enough to consult your owner's manual above all else when considering how to vent your hearth appliance. If the galvanized pipe is exposed, it is susceptible to eventual rust and corrosion. B-Vent systems can only be terminated vertically, with several different kinds of caps available depending on your manufacturer's guidelines and requirements. These pipes are smaller in diameter than any other vent pipe, usually with a diameter of 3 or 4 inches. The term "direct-vent" refers to an appliance that uses only outside air for combustion and vents all exhaust directly back outside. It has cost me a LITTLE more during the cold months for the fuel (I was paying for wood). clearance to combustibles in the USA and Canada (always check your local fire codes) PelletVent offers a limited lifetime warranty If you have any questions about whether your system meets code with regard to this requirement, feel free to call or email us, and we will be happy to help. Most pellet stoves have 3 inch vent sizes. If installing your pellet stove venting at 2,500 feet or more above sea level, you definitely need four inch pipe. If terminating horizontally, the cap must be at least 6 inches from the outer wall of your home. For adjustable direct vent pipe sections do you need to seal and/or screw the non-twist lock part? Can a 3 or 4-inch pellet stove pipe be used for a small coal stove the size of a milk crate? Please see your owner's manual for more details. Even in a metal building it is what you use to penetrate the roof etc., if done to code. I bought the thimble to go thru the wall, but the wall width is much less than the thimble width. If you've got a new pellet stove and an existing masonry chimney, you can probably vent the stove through the chimney and save yourself the trouble of installing a through-the-wall vent. Type B systems can involve a multitude of distinct piping components, and the termination point is no different. Single wall pipe may only be used for the interior run and only in the same room as the stove. When a vent run must pass through a ceiling or wall, a transition to double or triple wall UL103 listed solid insulated class A chimney is required with no exceptions. At this point you would be able to convert to rigid chimney or pellet vent pipe with an adaptor. Clearance to combustibles is only 6 inches (vs 18 inches). If you are looking to extend or redesign your current chimney system, you need to know the make and model of your existing Class A pipe and purchase the same type, if possible. Direct-vent pipe is made specifically for a direct vent gas appliance. By code oil burning units require. Adding a supplementary, efficient heat source with This Old House plumbing and heating expert Richard Trethewey and stove installer Rob Dardano. The need for stainless steel only arises when your pipe will be exposed to the elements. Similar to direct-vent systems, pellet venting can be terminated either vertically or horizontally. But that is what I figured when I … 2 product ratings - NEW Selkirk 243246 3VP-A6 Pellet STOVE GALVANIZED CHIMNEY Adapter Pipe 5656509 ... NEW pellet stove venting system 3 inch diameter pellet vent 3PVL-KHA 3" Duravent. How long (years) should a Class-A chimney pipe system last? Pellet pipe is used all the way from the pellet-burning or corn-burning appliance to the termination point. This type of pipe will also work with your pellet stove as it also has a stainless steel inner chimney. For this reason, most Class A chimney manufacturers only sell elbows in kits that have two elbows and an elbow strap for support. Can I vent a 80,000 BTU garage furnace flue (4" diameter, lp) into an existing 8" wood burning stove flue (single wall) prior to going through the attic's class-A flue? Can I run a flex pipe from my pellet stove on my hearth out through the clean out door on the outside of chimney? "Top vent" and "rear vent" are self-explanatory, and "slant-back" refers to an appliance with a flue collar coming out of the unit at a 45-degree angle, with easy adaptability for vertical or horizontal venting with the use of a 45-degree elbow. Most brands have adapters that are sold separately. 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