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    Direct Vent Fireplace Pipes and Exhausts

    With the cold weather on its way, now is the time to ensure the efficiency of your fireplace or stove. One option you may not have considered is a direct vent pipe. Our direct vent fireplace pipe uses a coaxial system, meaning a smaller pipe within a larger pipe, which allows the pipe to act as an exhaust pipe as well as draw in air to aid the fire inside. has many options for direct vent pipes including installation kits. Our Corner Direct Vent Pipe Kit for use with FMI/Superior 5 Inch Inside Diameter Direct Vent Chimney Pipe is a convenient option that comes with all you need for installation, including all the pipes, screws, and a wall firestop. Buying all these parts separately can be expensive, but has them all together at a great price.
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    23 Questions & 21 Answers
    from Pecos, NM asked:
    August 21, 2017
    I am planning on replacing my wood burning stove with a direct vent gas log stove. My question is about the venting. Can I re-purpose the 6" stove pipe I already have installed by adding a 4" flexible pipe inside it and mate both to the new direct vent gas stove?
    1 Answer
    Unfortunately, it is not possible to attach a direct vent unit to the chimney you currently have installed. We apologize for any inconvenience.
    Brennan W.
    on August 22, 2017

    from Worland, WY asked:
    March 13, 2017
    I'm looking to direct vent through the wall with my Napoleon XIR3NSB gas fireplace. Please specify the proper vent kit/accessories to accomplish it. Thank you.
    1 Answer
    As this can only be installed inside an existing masonry fireplace, it can not be vented horizontally.
    Brennan W.
    on March 14, 2017

    Scott Gower
    from Kansas City, MO asked:
    January 7, 2017
    We purchased a Majestic LP gas fireplace direct vent from you guys and need to find out what flue configuration we need to go from fireplace to roof top.
    1 Answer
    We will be happy to assist you. To get you the most accurate quote, please follow the link below: Chimney Quote Form
    Brennan W.
    on January 9, 2017

    from Calgary, Canada asked:
    December 19, 2016
    We have a Majestic RFDV22 RN fireplace, that we are looking for additional pipe for. It seems to be obsolete in most places. It's the 7 inch pipe with the 4 inch inside, no twist lock. We have the venting items, we are only in need of more pipe. Could you help me find either an adapter to use the newer pipe or if you have the pipe that we need.
    1 Answer
    Please answer the questions asked on our Chimney Pipe Design & Quote Form and include this information in the additional comments.
    Will M.
    on December 20, 2016

    from Baltimore, Maryland asked:
    November 21, 2016
    I have an Empire propane direct vent stove in my garage and need a high wind horizontal vent cap because when it gets very windy the pilot constantly goes out. There are two vent pipes coming out of the unit and through the exterior wall; one inside the other. The inside pipe is 4" and the outside pipe is 6" . Do you have something that will work for my needs? This is not your normal double-wall pipe. It's simply two metal pipes, one inside the other with an air gap between them.

    Mark Mougine
    from Seattle, WA asked:
    November 17, 2016
    I am installing a propane fireplace with a flat screen TV in a inset above the unit. Can I install a 90 degree turn, with a 8" snorkel pipe right out of the stove? I plan on going 90 degrees over beyond the TV inset and 90 degree up through the roof. Can this be done?

    from Victorville, CA asked:
    October 27, 2016
    I am replacing a wood burning free standing fireplace with pipe through the ceiling with a new pellet stove that requires a 3 inch pipe. Can this vent through the ceiling as well as the old free standing one did? Or, do I have to get a kit that vents through the wall?
    1 Answer
    You can vent a pellet stove vertically through the ceiling.
    Brennan W.
    on October 28, 2016

    from Gray Court, SC asked:
    December 28, 2014
    What size direct vent pipe is required for an OXDV30NV gas heater?
    1 Answer
    This unit can be vented with either the Monessen/Majestic 4 x 7 direct vent pipe or Simpson Duravent GS series 4 x 6 5/8 inch pipe. The Monessen brand components can be seen under our Direct Vent Pipe section. You can then select the "Monessen" brand from the side bar on the page. If using the Simpson Duravent brand, the DirectVent Pro Gas Vent Pipe is the product line to use. The Dura-Vent DirectVent Pro Vermont Casting Stove Vent Pipe Starter Collar must be used in order to utilize the Simpson Duravent piping.
    on December 29, 2014

    from VT asked:
    November 4, 2014
    Does the Empire DV55ELP wall heater come with a venting kit? Is there anything else that I need to purchase to install it?
    1 Answer
    This model does indeed include the through the wall venting kit as standard. No other components need to be purchased with it.
    on November 4, 2014

    Tom Zentz
    from L'Anse, MI asked:
    October 6, 2014
    I bought a used Vermont Casting propane stove that is a direct vent. The model #DV750L Prop and the serial # GA183880. The dealer here in Michigan says they don't make the pipe for this older model. I want to vent it vertically. Do they still make this pipe for the stove cap? Also, Do you have this pipe? I believe the pipe has a 4 in inner pipe and a 6 5/8 in outer pipe.
    1 Answer
    After speaking to the manufacturer, it appears that this stove was not produced by Vermont Castings. However, literature with this model number was found, stating that Aladdin Hearth Products was the producer of this item. I do see that they mention the use of Simpson Duravent GS, which is a 4 x 6 5/8 inch vent system. As such, this is likely the same appliance. The Simpson GS is still available, however the literature mentions that a collar extension is necessary to make the flue pipe connection. I do not have access to this extension and Simpson does not offer an anchor plate that can be used in place of it. I apologize for the inconvenience.
    on October 8, 2014

    from Lakehurst, New Jersey asked:
    August 15, 2014
    I just purchased 2 fireplaces from you and they both require an open disk flue restrictor. Are they supplied with the units? If not, I cannot find them on your site. Can you help me?
    1 Answer
    The flue restrictor is included with both fireplaces on order. When installing the fireplaces with a horizontal termination as it seems you will be doing, the center rib will be removed from the restrictor disc as outlined on page 20 of the owner's manual.
    Chris C.
    on August 15, 2014

    from San Jose, CA asked:
    August 8, 2014
    I was wondering if you could tell me if you sell a 2 story vent kit with a cap that goes straight up for the Napoleon LHD45?
    1 Answer
    Napoleon offers 4 x 7 flex venting in up to 10 foot sections. Multiple sections can be coupled together for longer installations. We also offer rigid venting that can be configured to your exact needs. If you would like to advise on the overall footage, as well as the pitch of the roof, I will be happy to generate a quote.
    on August 8, 2014

    from Boston, Ma asked:
    March 10, 2014
    I have a Vermont Castings direct vent gas stove that I need to vent. The pipe size coming off the back of the unit is 4 x 7. I am having a tough time finding pipe for this setup. Is this an odd size?
    1 Answer
    Your Vermont Casting Stove will likely use either Majestic or Monessen 4" x 7" direct vent pipe which can be found on our website here. Select the "Monessen" option listed on the left hand side of the page to view the individual components we offer.
    on March 10, 2014

    from Fairfield, Iowa asked:
    January 6, 2014
    Can the Dura-Vent DirectVent Pro Snorkel Vent Termination Cap be painted?
    1 Answer
    Per the manufacturer, this item is approved to be painted with any high temperature aerosol paint. We carry an extensive line of paint manufactured by StoveBright that can be used. It is advised to wipe down the snorkel with a 50/50 mix of water and vinegar to remove any excess machine oil, prior to painting the unit.
    Collin C. - NFI Master Hearth Professional
    on January 9, 2014

    from Kansas City, Missouri asked:
    December 12, 2013
    Can the Majestic 42 inch Echelon Wide View Direct Vent Gas Fireplace (WDV500PTSC) which has a dedicated top vent be converted to a side vent? If so, how and what do we need to purchase to do this conversion?
    1 Answer
    Unfortunately, this model does not have provisions to be converted to a side vent model. This is primarily because the design and BTU output of the unit warrants a 12 inch vertical vent run, before the vent piping can be directed horizontally. This is fairly typical of the larger horizontal units.
    Collin C. - NFI Master Hearth Professional
    on December 12, 2013

    from Cape May, NJ asked:
    December 8, 2013
    I purchased a Vantage hearth fireplace. I did not purchase venting at the time because I wanted to get a more accurate measurement for the venting requirements. Are any of the angle products (like 90 or 45 degree elbows) adjustable similar to duct work, or are they fixed? If they are fixed, does FMI make a flexible 5 x 8 vent or is there a compatible product available? I may have a tricky situation in my attic.
    1 Answer
    The rigid elbows for the FMI pipe required for your Vantage Hearth model are indeed fixed and not adjustable. FMI does make flex vent available for the 5" x 8" system, however it is only meant for use in a horizontal termination.
    Tyler M. - NFI Certified Specialist
    on December 9, 2013

    from Fremont, WI asked:
    November 21, 2013
    How far through the roof does the pipe have to be for a direct vent fireplace on a pitched roof ?
    1 Answer
    The distance required above your roof line is determined by the manufacturer of your direct vent appliance and the requirements stated in the owner's manual. If you do not have access to that information, please reply with the manufacturer and model of your unit and we can research this for you.
    Tyler M. - NFI Certified Specialist
    on November 21, 2013

    from Andrews, Indiana asked:
    November 6, 2013
    I have a Vanguard direct vent fireplace (model VT32P) and I need to purchase vertical vent pipe. The manual says that it requires a 5 x 8 system but the true measurements of the actual pipe are a bit less than that. Is your direct vent pipe comparable with my fireplace?
    1 Answer
    This product does indeed use the FMI brand 5 x 8 direct vent piping system, which does measure out to be slightly smaller in practice. The products can be seen here. I will be happy to answer any questions you may have about the components.
    Collin C. - NFI Master Hearth Professional
    on November 7, 2013

    from Woodward, OK asked:
    October 2, 2013
    I am looking at the Tahoe DVP-48-FP91N. What size pipe does it take?
    1 Answer
    The 48" Empire Tahoe DVP48FP91N direct vent fireplace can use the DuraVent DirectVent Pro pipe with a 5" inner diameter and an 8" outer diameter.
    Tyler M. - NFI Certified Specialist
    on October 2, 2013

    from Denver, CO asked:
    April 8, 2013
    I'm replacing an old insert with a new Kozy unit. the old unit exhaust exited out of the top of the unit into a double wall pipe that went up two stories. The combustion air supply is a 3" flex that pulled from a different source. Is there an adapter that will fit into the new unit and allows for the exhaust pipe to go in one direction, while the combustion air is piped in from another pipe?
    1 Answer
    I am not aware of such an adapter that is currently being made. Usually, direct vent piping uses a colinear pipe, with the outer pipe drawing fresh air into the unit for combustion. Units that do not have this sort of setup will usually use a separate 3 inch or 4 inch duct that draws air from another source, similar to what you have now. The new unit may have a similar provision.
    Collin C. - NFI Master Hearth Professional
    on April 9, 2013

    from Birmingham, AL asked:
    December 13, 2012
    I have a gas ventless fireplace that measures 39" across the front. There is a cantilevered chase but it does not extend to the roof line. It is effectively useless because whenever you fire it up, it fills the house with stink. I want to replace it with something vented. What are my options?
    1 Answer
    If you have a full-bodied zero clearance vent-free fireplace, you can remove it and install a direct vent zero clearance fireplace. Please see our selection here: Direct Vent Fireplaces Most of these fireplaces can be vented and terminated horizontally (some straight out the back). For more information, please see our Gas Fireplace and Stove Buying Guide.
    Tyler M. - Fireplace Specialist
    on December 14, 2012

    James Burbidge
    from Bancroft, Ontario asked:
    November 28, 2012
    I need to bend a 4x7 coaxial flexible aluminum direct vent pipe into a 90 degree elbow. I am concerned about kinking the pipe and about maintaining the correct clearance between the pipes as I make the bend(s). What is the best technique for creating a good elbow?
    1 Answer
    The best way to accomplish a clean bend in the pipe would be to use a piece of 4- or 5-inch diameter PVC piping to form the bend around. I recommend using a pair of clamps to hold the inner pipe against the side of the outer pipe. You can then work that side of the outer pipe around the piece of PVC gently, until you have the desired bend. Remove the clamps and reinstall any provided spacers.
    Collin C. - NFI Master Hearth Professional
    on November 28, 2012

    Phil Fraser
    from Reading, PA asked:
    November 5, 2012
    I have a propane forced air heater from a mobile home that I would like to install in my garage. I need to run a chimney pipe out of my roof. The roof is not insulated and it is a direct shot right to the roof, no ceilings to go through or anything like that, so I can run a direct pipe up through my roof. What do I need as far as a roof thimble and other parts to make the transition through the roof?
    1 Answer
    Generally, you would only require a fire stop, roof flashing, storm collar, and cap to make the penetration through the roof. However, this will depend on the type of heater. Most forced air heaters will use B vent piping between 3 and 6 inches in diameter.
    Collin C. - NFI Master Hearth Professional
    on November 6, 2012

    If you have a newer airtight home or you just want to increase your home's energy efficiency, direct vent pipes may be a good option for you. And no matter what type of fireplace or stove you have, has direct vent pipes that will work for you. Whether you need a Direct Vent Pro Gas Pipe, a Secure Flex Direct Vent Pipe, or anything in between, has options at great pricing with free shipping! If you are unsure about which fireplace exhaust pipe your fireplace or stove needs, has a Chimney Pipe Buying Guide, which explains all the major piping options in great detail. also offers free quotes and designs from their chimney specialists. Installing a new venting system in your fireplace or stove can be intimidating, but is here to help you achieve a beautiful, energy efficient fireplace or stove for your home.
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