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Old 08-27-2009, 03:59 PM   #1
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Default Just Curious

For those AG'ers out there, what is your loss due to boil off? I boil on a propane burner (15.5 gal keggle) and loose about 1.5 gals/hr. This about normal?


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Old 08-27-2009, 04:19 PM   #2
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Sounds about right. I usually go into the boil with ~7gallons and get down to 5.5 gal after 60 min. It also depends on the width to height ratio of the pot (surface area) and the vigor of the boil.


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Old 08-27-2009, 04:21 PM   #3
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I average 1.5 gal./hr. also.
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Old 08-27-2009, 04:23 PM   #4
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Quote:
Originally Posted by Denny View Post
I average 1.5 gal./hr. also.
yup yup

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Old 08-27-2009, 04:28 PM   #5
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Seems about right to me. My yield to the fermentor is around 12 gal. from a 15 gal. boiler, and I estimate that about half of that delta is from boil off. Of course, your actual loss will depend on the setting of your flame, configuration of the kettle, and (I suppose) the relative humidity.
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Old 08-27-2009, 04:35 PM   #6
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I brew in my "man cave" a 20 x 12 shed, i've noticed that when i have my fans blowing to cool the shed down, I loose even more, like 1.75 gal/hr I think it somehow pulls more of the vapors off creating more loss,
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Old 08-27-2009, 04:39 PM   #7
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7G in for 5.5 out for 5 into keg
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Old 08-27-2009, 04:59 PM   #8
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With everything accounted for (loss to hops, chiller, boil off, etc) I'm starting with between 8 - 8.5 gallons to hopefully get to 5.5 into the carboy.
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Old 08-27-2009, 05:16 PM   #9
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Snafu, I'm about the same.

Kilted, I've never understood loss to chiller. What's the deal w/ that? I can't think of the reason why we would loose volume to the chiller. thanks.
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Old 08-27-2009, 05:43 PM   #10
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I'm using a CFC...I'm not loosing a whole lot in there, but there is always some left and it isn't my weakest link by anymeans. Pump isn't going to be able to push out all out once the kettle is empty.


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