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Thread: Height of Evaporator Stack Above Sugarhouse Roof?

  1. #1
    Join Date
    Jun 2014
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    Albany, Vermont
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    Default Height of Evaporator Stack Above Sugarhouse Roof?

    What is the minimum height of an evaporator's smokestack above the sugarhouse roof?
    2023 - 2' X 6' Smoky Lake Products "Silverplate" evaporator + Increase taps up to 500
    2022 - 295 Sap Sak taps - Sold sap.
    2017-2021 - Didn't tap.
    2016 - 150 Sap Sak taps - Sold sap.

    https://www.larrybohenwebsolutions.com

  2. #2
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    Apr 2019
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    northwest CT
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    i dont know of the minimum height but mines 4 feet

  3. #3
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    UVM Proctor Maple Research Center, Underhill Ctr, VT
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    Quote Originally Posted by OrangeAgain View Post
    What is the minimum height of an evaporator's smokestack above the sugarhouse roof?
    Typically, minimum stack height is double the length of the evaporator. The higher it is the more draft you will get. Generally you want the stack to extend a minimum of 2 ft above the highest part of the roof within 10' of the stack. Again, those are MINIMUMS. Often more is used to increase draft, especially if you're in a hollow or low-lying area. Be sure to check to see if any local codes or insurance recommendations apply.

    If burning wood, a spark arrestor is also a good idea if there is anything flammable (house, woodshed, barn, etc.) within a wide radius of the sugarhouse. The wind will toss burning embers quite a long way.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  4. #4
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    According to what I learned years ago, when I sold and installed wood burners, the stack must be at least 3' above the roof and 2' higher than anything within 10', at least that was the code in New York State. I believe it was the national building code, but only guessing on that.
    Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
    Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
    Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
    After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.

  5. #5
    Join Date
    Sep 2015
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    Rumney NH
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    The stack must be at least 3' above the roof if coming out the ridge and 2' higher than anything within 10' of the roof. Flats you are spot on.
    2017 140 taps 30x8 12x16 shack 28.5 gal
    2018 158 taps 30x8 12x16 shack with 8x8 kitchen 44 gal
    2019 223 taps 30x8 12x16 shack with 8x8 kitchen 36 gal
    2020 226 taps 30x8 12x16 shack with 8x8 kitchen 250 waterloo ro 63 gal
    2021 230 taps 30x8 12x16 shack with 8x8 kitchen 250 waterloo ro 37 gal
    2022 230 taps 30x8 12x16 shack with 8x8 kitchen 250 waterloo ro 55 gal
    2023 235 taps 30x8 12x16 waterloo ro 50 gal
    2024 54gal

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