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Which flue liner to go for

Discussion in 'Building' started by Ratty80, 29 Aug 2011.

  1. Ratty80

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    Dear all

    Just looking for some advice on what chimney liner to go for.

    I have found some 316/316 stainless steel liner for £25 per square metre with 10 year guarantee. See link
    http://www.qualitystoves.co.uk/quattro-flue-liner-316l316l-grade-p-898.html

    The stove is 5kw and I believe this liner will be more than adequate for the job.

    They also do a 904/904 grade stainless steel for £35 per metre. This has 20year guarantee.

    Has anyone got any experience with the dif types or with cheaper linings failing?

    Any help/thoughts/advice would be a big help:)
     
  2. PrenticeBoyofDerry

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  3. Ratty80

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    Hi prentice boy it's a 5kw inset log burning stove that sits in a 750x435 opening that I have made in my chimney breast

    There r actually some Photoes I posted in previous thread.
    http://www.diynot.com/forums/viewtopic.php?t=287065&start=0

    Do u know the difference between 316 and 904 steel?
     
  4. PrenticeBoyofDerry

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    316 is normally found in domestic installs as you would normally find 904 for more commercial/industrial usage.
    The rating is to do with the temps it can tolerate.
    It will be a thicker gauge.
    When it states 904/904 that means both inner and outer skins are that grade.
    As you will come across 904/316, which means the inner and outer skins are different grades.
     
  5. Ratty80

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    Thanks, I figured that was probably the case so think I'll get 316/316 tomorrow:)
     
  6. Blagard

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    They are simply different grades of stainless steel see S S grades. See also http://www.fluesupplies.com/product_info.php?products_id=400 for a mixed steel liner The difference is I believe resistance to corrosion, pitting etc. Unlikely that 904 is thicker, it does cost more to produce though!

    A quote from a flue specialist is "There are two grades available, 316L and a higher grade of 904L which is suitable for the extreme conditions found with coal based solid fuel installations"
     
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  7. Ratty80

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    Thanks Blagard.

    So this now brings me to think that for an wood burner I maybe need to go for 316/904...I think I'll give them a bell and see what they recommend(thought I'd get some advice first so I didn't end up getting unnecessarily sold the most expensive)

    Thanks for advice
     
  8. MattBozmeister

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    I was confused about the whole 316 / 904 stuff too, I mean who's to know which one is best? Well as it happens some guy wrote a simple guide explaining it - https://flues2you.wordpress.com/what-type-of-flue-liner-do-i-need/ - thankfully!

    Looks like 904/904 is the best - unless your fire isn't going to be used heavily, in which case 904 / 316 should suffice (and is cheaper too!)
     
  9. Blagard

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    MattBozmeister

    The thread is three years old, I reckon he will be sorted by now, all the same welcome to the forum, just watch the post dates
     
  10. fatthumb

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    I would call the posting timely, as it was just the info I needed prior to installing a pellet boiler.

    All useful information is just that...
     

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