Measuring stack temp and draft

eekster Posted By eekster, Feb 15, 2008 at 12:57 AM

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  1. eekster

    eekster
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    Oct 24, 2007
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    I have read alot of you guys measuring stack temps. and draft. My question.. I have insulated pipe all the way to my boiler,
    I don"t think I should drill a hole to do my readings. Any suggestions? I am real curious on the temps and draft.
    Thanks, Keith
     
  2. BrownianHeatingTech

    BrownianHeatingTech
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    Oct 5, 2007
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    Carefully drill a hole, no bigger than you actually need for the probe of the draft gauge (the thermometer should be smaller), and get a bolt that you can twist into the hole to seal it when you aren't taking a measurement.

    Joe
     
  3. eekster

    eekster
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    Oct 24, 2007
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    Joe, thanks for the suggestion, I presume you have done this before? Where is the best height to measure? I have a tee out of the back of the boiler and about 3 1/ 2 feet of pipe to the ceiling, 4 1/2 foot in the attic and and 9 ft. out the roof.
    Keith
     
  4. Nofossil

    Nofossil
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    Oct 4, 2007
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    Keith, I've got insulated on mine as well, but there's about 3" of thimble on the back of the EKO before it goes into the stovepipe. I drilled a 1/8" hole there and stuck my probe in.
     
  5. BrownianHeatingTech

    BrownianHeatingTech
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    Oct 5, 2007
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    As nofossil says, if you can do it right at the back of the boiler (before the tee), that would be best. If not, go a couple feet beyond the tee so that the turbulence the tee creates has a chance to subside.

    Joe
     
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