In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

Best Chimney Pipe Liner? converting 6" woodstove to pellet

Discussion in 'Pellet Stoves, Pellet Fireplaces, Pellet Furnaces' started by wildwest, Jul 24, 2014.

  1. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    What models would any of you recommend?

    I believe its single wall to the ceiling, then double wall through the attic if that makes a difference. Also this stove will be burned hot 24/7 for atleast 6 months out of the year so I am hoping to find something that hold up to more cleanings than milder climates.

    TIA
     
  2. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    Bump...

    I looked at a picture taken before we bought the home and its in terrible shape, too gross to post the pic. Conveniently that view of the pipe has been blocked since I moved here last Oct. Anyway its not worth refinishing. Can I get a duravent kit and leave it plain metal instead of lining the old gross pipe? Is there any safety benefits either way? Would someone know the name of keyword to googling the 4" kit?

    Can I run the 4" duravent kit pipe through the old 6" double wall in the attic?

    thanks
     
  3. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    Answered one of my own questions, yes pellet pipe through old class A.....

    upload_2014-8-6_17-12-53.png
     
  4. Lousyweather

    Lousyweather

    Joined:
    Dec 23, 2013
    Messages:
    2,798
    Likes Received:
    9,040
    well, I'll bite! If you can get the pellet pipe and the class A sealed such that no water follows the pipe down into the room, youre fine......I am generally against make-up joints where you cant see em (inside the class A), but what you propose should work with a minimum of fuss, ya just have to seal the top somehow.

    I would also add that its pretty important to get the existing Class A clean.....any creosote in there is still combustible....so, start with it as clean as possible......
     
    wildwest likes this.
  5. RockyMtnHigh

    RockyMtnHigh

    Joined:
    Jan 17, 2014
    Messages:
    641
    Likes Received:
    1,130
    Location:
    Bailey, Colorado
    On a job like this, I like to use a flat roof flashing at the top of the old Class A chimney with a vertical cap and storm collar. On the bottom... you sometimes have to get creative and paint a storm collar black or fabricate something on your own and paint it black to look pretty. With a flat roof flashing it is easy to seal it up and avoid leaks, cut to size if wanted or just leave it be. The installation of this piece can vary from chimney type to chimney type and how it connects.

    http://www.duravent.com/Product.aspx?hProduct=9

    Look at the pic that says "Masonry chimney religning". You can do it like that with class A as well, you just need to find a creative way to secure the flashing and make sure you silicone it all to keep weather out.
     
    wildwest likes this.
  6. stuckinthemuck

    stuckinthemuck

    Joined:
    Oct 4, 2013
    Messages:
    3,218
    Likes Received:
    15,075
    Location:
    Wandering around in the NH woods.
    Is there any reason that you can't direct vent out the side of your house and then just close off the ceiling and roof penetration? Not sure if there's something I'm missing.

    StoveExterior1.jpg
     
  7. jtakeman

    jtakeman Moderator

    Joined:
    Oct 4, 2013
    Messages:
    12,194
    Likes Received:
    54,972
    Location:
    NW CT foothills
    Yes, It could be direct vented. As long as code was followed. Most code have height limits due to snow levels.

    I'd suggest an up and out though. JIC you replace the stove down the road and the new unit has a higher outlet. The draw back is there could be a chance of staining on the homes exterior due to soot. Through the roof should help eliminate the chance of that.

    I think the OP already has the hole through the roof. Unless you plan on keeping the wood stove? Using the existing hole sounds like the better option.
     
    wildwest likes this.
  8. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    Ditto J's reply, and 10' to 20' snow drifts that started in Nov and did not melt until late May. I also read somewhere that straight up is recommended even though it can direct vent. Thinking it was the owners manual? It will be our "furnace", 24/7 for minimum 6 months per year so I am going as safe as possible. Also, in my particular situation I only have one exterior wall to the outside, 20' long and filled up 16' with windows.....(triple pane w special order high solar gain glaze!)
     
    Last edited: Aug 7, 2014
  9. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    Fantastic, thank you! Luckilly Dear Husband is a cautious man and can get roofing materials at a discount. I forwarded your post to him, thanks! And no worries about the collar color, poor neighborhood full of great people. Everything on the exterior that has paint is sandblasted from the wind in a few short winters anyway :)
     
  10. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains


    You have incredible listening skills! The existing stove will eventually be used in my husbands new man cave on que for next summers remodeling. This entire home was his man cave, on a lake, backs up to BLM, no covenants etc, but things changed and I invaded it...... We never intended to actually live in this fishing cabin but it made too much sense not too. Thank you for your input!!![/quote]
     
  11. My IS heats my home

    My IS heats my home

    Joined:
    Dec 1, 2013
    Messages:
    7,394
    Likes Received:
    17,655
    Location:
    Albany, NH
    This is all new to me. I'm not a pellet guy but I do have some know how with wood stove flues.
    I'd be curious what kind of flue temps a pellet stove has vs. the wood stove. Obviously paticulates are minimal
    with the pellet stove and being able to direct vent.

    As WW has said they would be burning full time for 6 months, that may put any condensation between the
    2 pipes from appearing. If that was a concern I'd think you would have to insulate your 4" single wall going into the 6".

    It sounds as if it may work with minimal changes. A seal of some kind at the top would be necessary, to keep the space from letting moisure in. A top plate of some sort.
     
    wildwest and RockyMtnHigh like this.
  12. RockyMtnHigh

    RockyMtnHigh

    Joined:
    Jan 17, 2014
    Messages:
    641
    Likes Received:
    1,130
    Location:
    Bailey, Colorado
    Tis why I suggested a flat roof flashing for the top. Big enough to cover the Class A, and big enough cone to shed away water with a storm collar. THEN, if you ever want another woodstove, you can have it.

    Also Simpson Duravent and EVERY pellet stove manufacturer from what I recall actually says that a vertical vent situation is the best way to go before direct vent etc...

    Not that direct venting, up and out, out and up is bad, I install them that way all the time but vertical does seem to be preferred by pellet stove manufacturers. Win Win
     
    My IS heats my home and wildwest like this.
  13. jtakeman

    jtakeman Moderator

    Joined:
    Oct 4, 2013
    Messages:
    12,194
    Likes Received:
    54,972
    Location:
    NW CT foothills
    Pellet stoves has a lower flue temp than wood stoves. But pellet stoves sometime push fumes(usually on start up) due to a pressured exhaust. So all seams within the dwelling will need to be sealed.

    I have seen several pellet stoves connected to wood venting. Pellet venting and a proper adapter used to connect it to the wood venting. I would also suggest sealing all interior seams even the wood venting.
     
    Last edited: Aug 7, 2014
  14. RockyMtnHigh

    RockyMtnHigh

    Joined:
    Jan 17, 2014
    Messages:
    641
    Likes Received:
    1,130
    Location:
    Bailey, Colorado
    This is why I like running 4" rigid pipe through a short class a chimney rather than adapting. A liner is preferred but if you only need 7 feet you are stuck buying a whole kit and still have to finish off the "look" at the support box. When I do this I silicone AND foil tape the connections within the class A chimney (this only works on runs without elbows obviously) to eliminate that problem. IT IS soooo much easier to clean and if done right you will not have exhaust leaks.

    These are definitely issues to think of though, with a pressurized exhaust system.
     
    Last edited by a moderator: Aug 7, 2014
    wildwest likes this.
  15. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    I have some new questions if you can answer :) VENTING

    I want to move our new stove to the corner of the room, logical for heat distribution with the eco-65 cfms. We will close up the old woodstove pipe location. New pipe and new hole in roof as well. The 6" pipe is just plain old and neglected and would take more than I can manage to make it decent again.

    1) Vent, Straight up through roof ok? I found calculations for how long we can run venting for our new stove, we "could" use 45* angles to get it back to old woodstove pipe location but I would rather go straight up and keep the pipe out of our way... Is there and advantage to using the old woodstove pipe opening besides to cost of closing up old opening and making a new one?

    2) Do I NEED an attic off-set? Any reason not to go straight up with new venting install?

    3) Is sealing the pipes together with RTV (specified) the same stuff we used on valve cover gaskets on our old Chevy trucks?

    4) Is the galvanized pipe easier to keep looking clean? I have always had black woodstove pipes that look dusty quickly.... (Dirt roads, dogs, etc)

    5) the parts I *think* I need from Duravent are: ( please tell me what items you might add or delete from below, I would be grateful!)

    vertical flat ceiling kit (4PVPKVA)

    Fresh Air Intake kit (3PVP AIK)

    Pipe for just under 20' (if straight up), blk or galvanized....

    90* angle for base of exhaust & clean Out Tee 4PVP TB

    I think the flat roof flashing comes in the ceiling kit above?

    Attic Insulation sheild....Unless its included in the ceiling kit ablove? Do you know? (4PVP-IS)

    Could the the horizontal venting end cap benefit us in our nonstop wind that carries snow and dust in it? I was thinking upright with the end facing downward?

    6 ) I cannot locate fresh air intake diameter in the eco-65 owners manual, does anyone know? Also the Fresh Air Intake kit from Drolet looks like rubber clothes dryer vent lined with fiberglass insulation, is that all it is or am I missing a rigid pipe to keep pit open? Or should I just order the PelletPro OAK listed above?

    Sincerely,

    Pellet newbie
     
  16. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    3) Is sealing the pipes together with RTV (specified) the same stuff we used on valve cover gaskets on our old Chevy trucks?

    Found a utube video, apparently it comes in caulk tube and drolet specifies 500*.

    Will go find it!
     
    RockyMtnHigh likes this.
  17. wildwest

    wildwest Moderator

    Joined:
    Jul 21, 2014
    Messages:
    30,141
    Likes Received:
    141,362
    Location:
    Wyoming high plains
    ps, who is doublewide6 doing the great pellet stove videos?
     
  18. imacman

    imacman

    Joined:
    Oct 23, 2013
    Messages:
    6,599
    Likes Received:
    27,373
    Location:
    Denver, NC
    4" pellet vent to original 8" stove pipe....all adapters courtesy of Eric at Kinsman Stoves:
    Astoria 1.jpg
     
    wildwest likes this.
  19. DexterDay

    DexterDay Administrator

    Joined:
    Oct 2, 2013
    Messages:
    12,411
    Likes Received:
    31,632
    Location:
    Northeast Oh
    Imacmans pic above, is the stove I was talking about in our last PM (stoves with 45°'s and offsets). Some look great (Like his!!)

    I don't think doublewide6 is a member here? Are these videos on YouTube?
     
    wildwest likes this.
  20. RockyMtnHigh

    RockyMtnHigh

    Joined:
    Jan 17, 2014
    Messages:
    641
    Likes Received:
    1,130
    Location:
    Bailey, Colorado
    Yes. but it is easier to use in a caulk gun than a metal tube found at the auto parts store, also you will go through a bit of it.

    If you want to do belt and suspenders also get foil tape and tape the seams after you silicone them but honestly, if you use Simpson Duravent that stuff has come a long ways since I started installing. That stuff used to leak like crazy, even had to tape up the rivets lol.

    I didn't see the video but you are doing a lot of research and you are well on your way, you will be fine.
     
    wildwest likes this.