Results 1 to 8 of 8
  1. #1
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Gas fireplace makes soot streak on siding.

    What are the possible causes and what is involved in repair? I will always call for service by a qualified gas tech, but would like to elaborate, likely cause, expected costs, etc.
    I have talked to clients about gas log placement and they seem sceptical.
    I have mentioned that some gas logs produce more yellow flame and therefore more soot, and they just looked at me like I was making this s... up.

    When the fireplace glass becomes cloudy, does this indicate a leaky gasket? Easy fix?

    Pic 1 and 2 are at a townhouse, the neighbour's unit is leaving soot on the soffit cover. 3 and 4 are a 3 yr old home with hardiplank siding.

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    Last edited by John Kogel; 07-05-2009 at 05:57 PM. Reason: providing details, wanting details. :>)
    Inspection Referral SOC

  2. #2
    Join Date
    Dec 2008
    Location
    Montreal, QC, Canada
    Posts
    63

    Default Re: Gas fireplace makes soot streak on siding.

    Gas logs are probably the cause

    Blue flame denotes a proper air/fuel mixture and hence a correct temperature flame.

    Hence any thing but a blue flame in a gas fueled appliance probably means not correct blue temperature and the possibility of soot forming.


  3. #3
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: Gas fireplace makes soot streak on siding.

    How to fix?


  4. #4
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: Gas fireplace makes soot streak on siding.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  5. #5
    Join Date
    Mar 2007
    Location
    Near Philly, Pa.
    Posts
    1,643

    Cool Re: Gas fireplace makes soot streak on siding.

    John, you need a hearth pro in there for several reasons. The first pic shows a direct vent termination too close to a sidewall/inside corner. The second, I cannot see for sure. The third shows some exterior soot staining on the siding. The forth shows the white film that all gas fireplaces create.

    In each case, you need a qualified technician to inspect and test the fireplaces. You will need the listed instructions on hand to verifiy the visible clearances, log position, orifice size, gas pressures, etc.

    If all hearth appliances ran with a blue flame, we'd be out of business as no one would buy them. See the link JP posted.

    As usual, without the make, model and mfr. date code or serial #, you cannot make any specific statements about fireplaces other than refer to a qualified technician.
    Bob

    Keep the fire in the fireplace.

  6. #6
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: Gas fireplace makes soot streak on siding.

    Quote Originally Posted by Bob Harper View Post
    John, you need a hearth pro in there for several reasons. The first pic shows a direct vent termination too close to a sidewall/inside corner. The second, I cannot see for sure. The third shows some exterior soot staining on the siding. The forth shows the white film that all gas fireplaces create.

    In each case, you need a qualified technician to inspect and test the fireplaces. You will need the listed instructions on hand to verifiy the visible clearances, log position, orifice size, gas pressures, etc.

    If all hearth appliances ran with a blue flame, we'd be out of business as no one would buy them. See the link JP posted.

    As usual, without the make, model and mfr. date code or serial #, you cannot make any specific statements about fireplaces other than refer to a qualified technician.
    Bob
    Thanks Bob, I saw that thread. No answers there.


  7. #7
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: Gas fireplace makes soot streak on siding.

    Originally Posted by erodriguez1
    Is it possible to have soot build-up in a gas fireplace with ceramic logs? Thanks.
    "Esteban,
    You should always expect ceramic logs to soot up somewhat. Some log sets must have a very specific placement while other manufacturers leave the placement totally up to the homeowner. Vent free logs MUST be in their exact position. With most ceramic logs, you should try to minimize direct flame impingement, which leads to a soot formation.

    Proper combustion involves the old fire triangle of heat, fuel, and oxygen and combustion efficiency is time, temperature and turbulence. With gas logs, the soot build-up is usually caused by cooling the flame (such as by impinging on logs or embers or by too much secondary air) along with some inadequate mixing with oxygen. David P. Valley "

    Copied from elsewhere.

    Last edited by John Kogel; 07-05-2009 at 05:58 PM.

  8. #8
    Cobra Cook's Avatar
    Cobra Cook Guest

    Post Re: Gas fireplace makes soot streak on siding.

    It is ok for Vented logs logs to touch the flame and cause soot as this allows the closest look to a natural wood fire. ventless on the other hand the flame must not touch the logs and exact placement of the logs is imperitive. In the case of the pictures the vents in the location they are will blacken the areas where the exhaust fumes exit the stack, that is why most of the time the exhaust is vented above the roof line. The logs in the picture are I hope vented because of the glass doors, ventless logs can not have glass doors in front of them. Cobra


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •