Chimney recommendations.

Medic21 Posted By Medic21, Sep 1, 2018 at 12:37 PM

  1. Medic21

    Medic21
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    Feb 26, 2017
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    Not looking like the boiler will be fully installed until December or January due to replacing a well and a Jeep that kissed a deer this summer. I am thinking about changing the chimney because it has draft issues on warmer days and with a north wind it’s horrible. The picture is looking north. A 4 foot section and roof bracket have been ordered. Will this be enough?

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  2. JRHAWK9

    JRHAWK9
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    2', 10', 3' rule........The chimney must extend at least 3’ above the highest point where it passes through a roof. And at least 2’ higher than any portion of a building within 10′.
     
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  3. Medic21

    Medic21
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    It actually meets that now. I measured it a couple years ago. I’m thinking, I’m no expert at all, the wind coming over the roof is creating a downdraft to contend with. Am I wrong in thinking this?
     
  4. JRHAWK9

    JRHAWK9
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    I'm no expert either. LOL I just know about that rule back when I was looking at different chimney options. hmm, it's probably hard to tell from the photo, but it sure seems like it wouldn't. What pitch is your roof and how much does your current chimney stick above the roof right now?
     
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  5. Medic21

    Medic21
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    4’ and I think around a 5/12 pitch.
     
  6. JRHAWK9

    JRHAWK9
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    Doing some crude math, on a 5/12 pitch roof, at 10' away you are 4.2' vertically. Which means you need to have at least 6.2' of exposed chimney from the base. If you add another 4', then you should be good.
     
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  7. Medic21

    Medic21
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    Lol, I think I may have just measured ten foot after making a 2 foot mark and not two foot above. Math was never my strong suit.
     
  8. JRHAWK9

    JRHAWK9
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    oops! To me, judging by your photo, you don't look like it's tall enough based on that rule. However, it's hard to tell for sure looking at a photo.
     
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  9. Mrpelletburner

    Mrpelletburner
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    @Medic21 are you keeping the Fire Chief?
     
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  10. Medic21

    Medic21
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    For the beginning of the season it will still be in the house. After that in the shop. I plan on modifying it once I put it in the shop. I raised the chimney 5 feet to get it above the peak of the roof by one foot. Hopefully that will take care of the north wind problem. Boiler will be installed by end of December. I dug in the pex last week.

    I’m going to weld shut the air holes by the door and enlarge the ones across the top. Then I’m going to add an aux secondary air input that will be straight draft. Hopefully that will take care of all the issues.
     
  11. maple1

    maple1
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    What are you getting for a boiler?
     
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  12. Medic21

    Medic21
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    Woodmaster 4400. The only thing I can get local. Staying away from gasification due to needing longer burn times working 24hr shifts.

    I got hooked up with free wood. I’ve hauled three semi loads back to my house, all hardwood from the log buyer I haul for. This is all the stuff the mills don’t want from 20’ logs that may be hollow for a portion to the 3 and 4 foot cut offs. I was leery of the amount of wood I’d use but with cutting this in my driveway I’ll survive. I can get anywhere from 1-3 loads a month and even haul the scraps from the woods at the end of the jobs if I want. I figured I’d need 2-3 loads a year. All I’m out is fuel. I took the dump trailer over and loaded out of his yard with the front end loader. Two full loads didn’t make a dent in the pile then one full load of logs.
     
  13. Medic21

    Medic21
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    Feb 26, 2017
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    Hope this fixes my occasional downdraft problem.

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