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  1. #1
    darkbyrd's Avatar
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    Climashield Apex temperature question

    I'm looking to tackle another UQ project for myself and a friend, and have found conflicting information regarding the temp rating of climashield apex. In your opinion, what would an UQ with 2.5 oz, 5 oz, 7.5 oz, and 10 oz of climashield apex insulation be rated at?
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    BillyBob58's Avatar
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    Quote Originally Posted by darkbyrd View Post
    I'm looking to tackle another UQ project for myself and a friend, and have found conflicting information regarding the temp rating of climashield apex. In your opinion, what would an UQ with 2.5 oz, 5 oz, 7.5 oz, and 10 oz of climashield apex insulation be rated at?
    Assuming a well designed, draft free, dif cut UQ ( to allow a nice snug fit and help avoid compression of insulation):

    2.5 = mid/high 40s to 50F(at least)
    5= 20 to 30
    7.5 mid teens
    10= zero to 5F

    This is based on my personal experience at the warmer temps and using no other layers except cotton t shirt and jeans, with a CS WB Yeti. The rest is based on extrapolations from the warmer temps, plus what I have heard from some other folks, but in all cases using CS XP. Some say CS Apex is warmer for the weight, but I don't really know yet. Plus of course, people vary greatly and the above is when I or others were dry and well fed, and wind absent or well blocked.
    For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.
    Romans 8:18,21-22

  3. #3
    Member
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    Climashield Apex

    Quote Originally Posted by BillyBob58 View Post
    Assuming a well designed, draft free, dif cut UQ ( to allow a nice snug fit and help avoid compression of insulation):

    2.5 = mid/high 40s to 50F(at least)
    5= 20 to 30
    7.5 mid teens
    10= zero to 5F

    This is based on my personal experience at the warmer temps and using no other layers except cotton t shirt and jeans, with a CS WB Yeti. The rest is based on extrapolations from the warmer temps, plus what I have heard from some other folks, but in all cases using CS XP. Some say CS Apex is warmer for the weight, but I don't really know yet. Plus of course, people vary greatly and the above is when I or others were dry and well fed, and wind absent or well blocked.
    +1 on the numbers from BillyBob for 2.5 & 5.0 Apex-These are good ranges for both UQ & TQ from my experience with both weights of insulation. I have not used anything above 5.0

  4. #4
    Member SouthernExposure's Avatar
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    +2 on BB58's Apex 5.0 evaluation.

    I made a UQ last year using this insulation and using it for bottom insulation, I was right at the edge of comfortable at 30 degrees. I probably could have squeezed 5 more degrees out of it by adding CCF pads.

    I don't have any experience with the other weights.

    SE

  5. #5
    mbiraman's Avatar
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    I have a TQ with 2.5 and its good down to about 50,,,,,for me
    " The mind creates the abyss, the heart crosses it."

    “The measure of your life will not be in what you accumulate, but in what you give away.” ~Wayne Dyer

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    Climashield Apex temperature question

    I have used 6.0 and had it to the high. 20s wit no cold spots. It really is great stuff. Pretty light and toasty warm.

  7. #7

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    5.0 Apex

    Just finished my TQ/UQ made from 5.0 Apex. I will be doing testing in next few months and hoping to get down to 30. I'll report back.

  8. #8
    Lost_Biker's Avatar
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    I made a 7.5 (1 layer 5, 1 layer2.5) uq last month. It has worked fine down to a low of 44 so far. As a very cold sleeper, I expect it to get me to 20-25.
    I got in a fight one time with a really big guy, and he said, "I'm going to mop the floor with your face." I said, "You'll be sorry." He said, "Oh, yeah? Why?" I said, "Well, you won't be able to get into the corners very well."


    Underquilts.com

  9. #9
    Senior Member
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    I have a diy TQ, and UQ of 5 oz apex and have had it down to the upper 30's. and at those temps the TQ was plenty warm and I could probably push it down to below freezing, but was at the the lower limit for the UQ. personally I sleep rather cold.

  10. #10
    Prefers life at 12 MPH. FLRider's Avatar
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    The formula for figuring temperature ratings from CLO values is as follows:

    84 - (14 * CLO * X), where the final result is in degrees F, CLO is the CLO value of the material and X is the weight of the insulation in oz/sq yd. Note that this assumes no base layer worn (if there is a full base layer, change the 84* to 70*)

    So, for Climashield APEX (CLO value 0.82, per Thru-Hiker), the value would be:

    84 - (14 * 0.82 * X)
    = 84 - (11.48 * X)

    So, 2.5 oz:

    84 - (11.48 * 2.5)
    = 84 - 28.7
    = 55.3*

    5 oz:

    84 - (11.48 * 5)
    = 84 - 57.4
    = 26.6* F

    7.5 oz:

    84 - (11.48 * 7.5)
    = 84 - 86.1
    = -2.1* F

    10 oz:

    84 - (11.48 * 10)
    = 84 - 114.8
    = -30.8* F


    Now, below freezing, these calculations break down some. Since moisture accumulation through condensation, as well as drafts, become much more important when the outside temperature is 70*+ different from your skin temperature, the insulation you're using has to be much better fitted than at warmer temperatures. Figure these as "ballpark" temperatures, assuming a "normal" sleeper, perfect humidity, no drafts, and no wind.

    Figure on them being within 10* of comfort and you should be pretty close. Hope it helps!
    "Just prepare what you can and enjoy the rest."
    --Floridahanger

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