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  1. #1
    Join Date
    Sep 2007
    Location
    Fredericksburg, VA
    Posts
    885

    Default Adjacent Oil and Gas flues

    1918 house today had 1992 remodeling that appears to have included a chimney for a oil furnace and a gas log fireplace. Other than the cracks in the crown cap and the short flue tiles - I don't get a warm fuzzy feeling with the two flues almost butting. The direct vent flue for the gas log appliance is above the oil furnace vent. Someone added a shield on the side of the oil flue rain cap in an apparent attempt to separate the gases. Anyone have a reasonable common sense explanation why this installation might be unsafe or unacceptable

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    The above statements are expressed solely as my opinion and in all probability will conflict with someone else's.
    Stu, Fredericksburg VA

  2. #2
    Join Date
    Mar 2007
    Location
    Near Philly, Pa.
    Posts
    1,643

    Cool Re: Adjacent Oil and Gas flues

    The oil flue should extend about 18" above the top of the gas vent termination. The sulfurous fumes will eat up that aluminum cap. Also, those fumes can get entrained back into the air intake of that direct vent cap drawing acidic fumes all the way down into the fireplace where it can rot out everything. The best way to extend the flue is to reline it and use an extension piece of stainless steel to the listed termination. At my suggestion, at least one liner mfr. now makes an extension for just this application.

    Your suspicions were correct.

    Keep the fire in the fireplace.

  3. #3
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default Re: Adjacent Oil and Gas flues

    Camera on a stick? Home-made or store-bought?

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  4. #4
    Join Date
    Sep 2007
    Location
    Fredericksburg, VA
    Posts
    885

    Default Re: Adjacent Oil and Gas flues

    Thanks Bob!

    The above statements are expressed solely as my opinion and in all probability will conflict with someone else's.
    Stu, Fredericksburg VA

  5. #5
    Join Date
    Sep 2007
    Location
    Fredericksburg, VA
    Posts
    885

    Default Re: Adjacent Oil and Gas flues

    Quote Originally Posted by John Arnold View Post
    Camera on a stick? Home-made or store-bought?
    Homemade. 24' extension pole with a camera attachment I made from a cheap paint roller handle for the threaded part to screw onto the pole. I use cheap tripods for my Radon monitors so I had a ball joint camera mount to attach to the handle.

    I've had chimney's that I wouldn't have been able to see the top if I had a 40' ladder and I have few roofs that would allow a safe base for a ladder. Plus, the ladder feet can damage the shingles. I also use this gadget to see the roofs of 2-3 level houses when there is no way to view from ground. Sometimes I have to use a ladder in conjunction with the stick but I have also stuck it out upper story windows. Put the camera in video mode and run it up. I use a screen capture program to pull a picture of anything I might need in a report.

    Next - articulated joint with remote control and camera with live feed to a monitor/recorder at the base of the pole.

    The above statements are expressed solely as my opinion and in all probability will conflict with someone else's.
    Stu, Fredericksburg VA

  6. #6
    Join Date
    Jun 2010
    Location
    Vancouver
    Posts
    202

    Default Re: Adjacent Oil and Gas flues

    Stuart, your home made pole is something we can all use!! good idea now we all just waiting for someone to take it to the next level with remote control and images sent down to a monitor. Yes the tech is out there currently just not set up for the average home inspector at a price we all can afford to buy off the shelf.

    As to the gas vs oil flues good call. cross flowing gases can cause some serious problems. looks like who ever did the gas install was just thinking of their job and not what other uses the chimmey had and what was really going on. good example of poor workmanship.


  7. #7
    Join Date
    Sep 2007
    Location
    Fredericksburg, VA
    Posts
    885

    Default Re: Adjacent Oil and Gas flues

    Quote Originally Posted by Bill Hetner View Post
    Stuart, your home made pole is something we can all use!! good idea now we all just waiting for someone to take it to the next level with remote control and images sent down to a monitor. Yes the tech is out there currently just not set up for the average home inspector at a price we all can afford to buy off the shelf.

    As to the gas vs oil flues good call. cross flowing gases can cause some serious problems. looks like who ever did the gas install was just thinking of their job and not what other uses the chimmey had and what was really going on. good example of poor workmanship.
    There is a product being sold in Canada that looks interesting but the guys selling it will not provide an address or any form of proof that the company and product are real. Even if it's being run out of their garage, they should publish contact information other than an email address.

    The above statements are expressed solely as my opinion and in all probability will conflict with someone else's.
    Stu, Fredericksburg VA

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