Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Chimney Lining

Bill_3
Bill_3 Member Posts: 34
in THE MAIN WALL
Oil Heat,what type of lining would be used. Gas heat what type of lining.

Comments

  • Cosmo
    Cosmo Member Posts: 159
    liners

    Stainless steel can be used for either gas or oil, as long as boiler/ furnace conforms to liner's ul listing. All condensing gas/oil boilers use special venting, cannot be vented thru a standard chimney.

    Aluminum may be used for gas boilers/furnaces. It is much more economical than stainless, but most aluminum liner manufacturers only offer 5 year warranty.

    Most important is that the liner/chimney/direct venting system conforms to manufacturer specs, and local codes.

    Casmo
    Dependable P.H.C. Inc.
  • Dale
    Dale Member Posts: 1,317
    Gas lining

    If the chimney is straight it can usually be lined with lengths of B Vent. This is the best way to go if you are the ultra conservative type, doesn't cost that much more. Having said that for my own 30K input gas water heater i lined my own interior masonary chimney with a flex alum liner carefully sealed and secured at the top and nicely sealed and terminated at the bottom. In wisconsin were I live I recommend insulating the liner when used in exterior chimneys to be just that little bit safer.
  • Cosmo
    Cosmo Member Posts: 159
    Thank you, I forgot to mention insulation...

    Yes, when there is enough room in the chimney I always try to insulate the chimney when an aluninum liner is installed on a chimney going up an exterior wall. An added benefit to keeping condensation from forming on outside of liner is that you don't have to worry as much about the cleanliness of the existing chimney, the insulation protects the aluminum from the potentially acid coated existing liner.

    Casmo
    Dependable P.H.C. Inc.
  • Steve Bergstrom
    Steve Bergstrom Member Posts: 19


    I've built a double flue chimmeny IN the house I've nearly finished building. One of the flues is 10" round OD refactory cement liners rated at 2400 degrees (from Canada)for the wood burner. The other is a standard VC (orange)tile 8" square ID rated at 1400 degrees.The only portion of the chimmeny that is outside the house is the top 7ft. that protruds above the roof.
    I had planed on using the 8" flue for a condensating boiler that was going to be the sourse of heat for Rad. heat and the DHW
    Now I'm reading that I shouldn"t use the 8" flue for it's intended purpose. Suggestions please.
    TIA Steve

    There was an error rendering this rich post.

  • Steve Bergstrom
    Steve Bergstrom Member Posts: 19


    It seems that my chimney will be OK to use.I have it boxed in with steel studs and insulated with R-19 glass all the way to the roof shething.I banded the flue tile joints above the roof with fiberglass cloth and furnace cement, then filled the cavity between the flues and the wall of the chimney with vamiculite before casting the concrete on the top.Of course it's fire stopped at each floor This thing is 37'-6" high.(It would be long if it fell over)
    You wallies have a plesant nite. Steve

    There was an error rendering this rich post.

This discussion has been closed.

Categories