
By Ronald from White Cloud , MI on April 1, 2013
My masonry has an 8" tile flue, however we are using wood stove insert in the fireplace for heating and it works well. My question is, when we installed the insert we installed a 6" flex liner inside the chimney, which has been a problem. Do we need to remove it for inspection and are replacements still available?
By Tyler M. - NFI Certified Specialist on April 2, 2013
Answer:
Given how long your liner has been installed, it certainly should be cleaned and inspected. Depending on its quality, it may need to be replaced. We recommend contacting a local chimney sweep for cleaning and inspection. By Stephanie from Suffolk, VA on March 17, 2013
I would like to build an outdoor fireplace without using a firebox, but use a class a flue. What would I need to do this?
By Collin C. - NFI Master Hearth Professional on March 18, 2013
Answer:
If you are site building a fireplace, but would like to use Class A pipe to vent it, you will need to use an anchor plate to transition from the firebox to the chimney. An example is the
DuraTech All-Fuel Chimney Pipe Masonry and Zero-Clearance Fireplace Anchor Plate - For Chimney Pipes with an 8-Inch Inner Diameter - 9641. The plate will bolt over the opening that would be cut into the box to allow venting. Actual diameter of the chimney will depend on the size of the opening for your box. The ideal ratio is 10 to 1, which 1 square inch of flue to 10 square inches of fireplace opening. A chimney that is too small or large can cause drafting issues, including smoke spillage and overfiring.
By Steele from Cleveland on November 26, 2012
How can I tell if my existing chimney is Class A pipe?
By Collin C. - NFI Master Hearth Professional on November 27, 2012
Answer:
It is standard for factory-built wood-burning fireplaces to use Class A vent pipe. Most of these models will use an air cooled variety of Class A that has a four- to five-inch difference between the inner and outer walls. By Rodney from St. Louis, MO on December 23, 2012
I have triple wall stove pipe stainless steel, and I want to do a vertical installation. Can I use the Class A chimney pipe from the top of my stove to the top of my roof?
By Tyler M. - Fireplace Specialist on December 24, 2012
Answer:
No, wood stoves are designed to use single- or double-wall stovepipe from the top of the stove to the ceiling or wall of the room where the stove is installed. At that point (ceiling or wall), you transition to double- or triple-wall Class A chimney pipe.
We have all of the necessary components for these installation. If you prefer, please fill out our
Chimney Pipe Design & Quote Form, and we can provide a quote for your installation.
By Mark from Newport, VA on December 23, 2012
Is there a chimney liner/piping that I can install that will work with any stove/insert (regardless of type - wood/pellet/gas/etc)? I would like to do this once and be done for all time.
By Tyler M. - Fireplace Specialist on December 24, 2012
Answer:
The type of liner you need will depend on what kind of stove or insert you get. Generally, a 6" stainless steel liner would be needed for a wood stove or insert (installed into an existing brick/masonry fireplace), while a pellet stove would require a 3" or 4" diameter liner. A gas insert (B-vent or direct vent) would require an appropriate size and type of liner depending on the model. By Mike Mullen from United States on November 27, 2012
I'm considering adding a wood stove insert to my existing brick fireplace. Do I need to add chimney pipe? Or can I just exhaust to the current brick chimney?
By Collin C. - NFI Master Hearth Professional on November 28, 2012
Answer:
In order for the unit to vent properly, you must use a flexible chimney liner of the proper size and route it to the bottom of the first clay flue tile. Ideally, the liner would run the entire length of the chimney, as this would greatly increase the efficiency and improve the performance of the unit. The high efficiency inserts will not operate properly without at least the minimal length of liner in position.By marc from Michigan on November 19, 2012
Can a Duraplus Galvalume 6" elbow be used with Duraplus stainless steel pipe?
By Tyler M. - Fireplace Specialist on November 19, 2012
Answer:
Yes, the DuraPlus galvalume and stainless pipe sections are interchangeable, as long as the inner diameters are the same. By Patrick from Hayden,Al. on January 22, 2013
I just purchased a Vantage Hearth Performance Line Series 42 Inch Heat Circulating Louver Faced Wood Burning Fireplace with Full Insulation CUI-VC42LI1 and would like to know what 36",18",24" & 48" Class A Pipe will work on my fireplace.
By Collin C. - NFI Master Hearth Professional on January 22, 2013
Answer:
This unit uses FMI 8DM venting components. Please visit the item page for the
CUI-VC42LI1. You can then see the correct venting components by clicking the "venting components" tab on the item page.
By Joe from St. Paul, MN on January 14, 2013
I am looking for a chimney substitute for brick for an outdoor drying oven. The interior temperature of the oven will be 2100 to 2250 degrees, propane heated. The heating/drying process takes about 8 - 9 hours. The oven is in a stand alone shed outside. What options or products would you suggest and that are cost efficient also? I suspect I need two feet horizontal pipe with a elbow and 8 - 10 feet of stack.
By Collin C. - NFI Master Hearth Professional on January 15, 2013
Answer:
Based on the temperatures the oven will achieve, I would definitely recommend using a high temperature chimney system. Do you have any idea of what diameter vent the oven will require? Will the unit be completely sealed with a combustion air inlet? Was the unit custom built of prefabricated? Please advise at your convenience.By Dave from Pennsylvania on January 6, 2013
I bought a house in Pennsylvania. They installed a chimney system when the home was built but never installed a stove. I just bought a stove and I am trying to install it. The chimney is all Jacks Evans pipe. I heard they went out of business. Do you know a compatible brand I can use? I am looking for the chimney pipe adapter.
By Collin C. - NFI Master Hearth Professional on January 7, 2013
By Bill from Grinnell Iowa on January 15, 2013
I have some 30 year old solid pack pipe, measuring 7" inside and 11" outside diameter, that locks together. Is that pipe still made, and what is the name of it?
By Tyler M. - Fireplace Specialist on January 15, 2013
Answer:
We are unable to determine whether this pipe is still available. While we do not carry a pipe with these specs, it is possible it is still available through a manufacturer that we do not sell. We apologize for this inconvenience. By Roger on November 9, 2012
What size liner will fit a 7” square chimney flue?
on November 9, 2012
Answer:
A 7" chimney flue with no obstructions will accept a 6" reline pipe with no problems. However, depending on your locality and the type of appliance that you are venting, you may need an insulation kit for the liner you are installing. These insulation kits normally add an inch to the diameter of the liner you are installing. Be sure to leave room for the insulation, if it is required.
Please let us know if you have any additional questions.By Jeffrey on November 9, 2012
I have a wood burning furnace vented to a Metlvent (Hart & Cooley) stainless steel insulated chimney that passes through the roof from the basement. The existing chimney is 7" inside diameter and is in good condition. The recommended chimney diameter for the existing furnace is 6 inches.
Would it be feasible for me to line the existing chimney with a 6-inch diameter stainless steel liner to get better draft and reduce creosote build up? I am on the roof cleaning the chimney about every three weeks. I look forward to hearing from you.
on November 9, 2012
Answer:
Generally, this would be a perfectly acceptable way to resize the chimney to a smaller diameter for increased performance. For durability, I would recommend a 316Ti stainless liner, rather than a 304 grade. While the 304 is usually sufficient for wood burning applications, it can have a tendency to overheat and fail prematurely when used with a furnace.
To be certain there is not a problem with this, I would verify if anything is mentioned in the literature for the furnace. Most wood burning furnaces will allow a scenario such as this and cover it within the venting section of their manual. Please let me know if I can assist you with selecting product for the retrofit.By Kyle on November 9, 2012
I am building a concrete block garage that I want to add a woodstove to. I will be installing a masonry tetra cottage thimble. How do I transition from stove pipe to chimney pipe? Should this be done before the thimble, inside the thimble, or outside before the tee? I can install a 6-inch or 8-inch inside diameter thimble.
on November 9, 2012
Answer:
Typically, the transition to a chimney liner would be made just past the end of the thimble, inside the chimney flue. You would pass the stovepipe through the thimble, then into the takeoff leg of the tee. You will of course need to leave access to the underside of the tee to gain access to this area and make the connection.
Please let me know if you have any technical questions. I will be happy to assist.By Dale on November 9, 2012
I am installing a small hobby evaporator for maple syrup. The stack will be 7" stainless regular pipe. I would like to go through the wall, to a "T" for cleaning and then up approximately 9 feet. I expect the exhaust gas temperature to be 800 - 900 degrees continuously at the wall thimble.
What products would you recommend for the pipe transition? And the thimble for that temp? (6" wall), and pipe? I would like to use 8" for everything and convert my 7" pipe to 8" at the wall thimble if possible.
on November 9, 2012
Answer:
It is certainly possible to use an adapter from 7" to 8" before passing your chimney pipe through the wall. Traditionally, you would use single wall black stovepipe inside the building, then convert to double or triple wall Class A chimney pipe before passing through the combustible wall.
I would recommend using something like our 8" DuraTech double walled chimney. It is a ceramic blanket insulated chimney pipe that can pass through the wall, utilizing a thimble to maintain proper clearance to combustibles. Please advise what ZIP code the items would need to be shipped to and I will gladly get a quote together for you.By Dave on November 9, 2012
I have a problem with smoke seeping out the elbows of standard 6” black pipe. The elbows have to be turned from a true 90 as my wood burner is 20” away from chimney. Will these class A pipes and elbows cure this?
on November 9, 2012
Answer:
Class A chimney will most likely not be an option for your installation. I suspect that your stove pipe vents up and turns 90 degrees into a brick chimney. If this is the case, you will need to continue using single walled black stovepipe in the house.
If the pipe you are using now has crimped ends or has the male ends facing upwards, this could be causing the issue with smoke leakage. I highly recommend redoing the system with welded stovepipe, as it is less prone to leakage. Assembling the pipe with the male ends down will also help.
Please let me know if I can assist you further.By Bud from Scotland, CT on February 26, 2013
Will the 7' Duraplus Class A pipe connect to Metalbestes or Metalfab? I want to extend my existing chimney.
By Tyler M. - Fireplace Specialist on February 26, 2013
Answer:
No. As is the case with all Class A chimney pipe, you must use the same model, size and manufacturer for each chimney component; these brands are not interchangeable. You must use the same manufacturer's pipe for your entire chimney system for proper UL listing.