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Home Brew Forums > Home Brewing Beer > Extract Brewing > Boiling
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Old 11-22-2007, 02:52 AM   #1
Duluz
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At what boiling temp does it start to ruin your wort?


Or does it?

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Old 11-22-2007, 03:16 AM   #3
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The boiling temperature doesn't really change for differnt boils. But one thing to keep in mind is thermal loading. This is basically the amount of power that is transfered into the wort when boiling. It affects the boil-off rate and the formation of desirable and undesirable maillard products (browning). The literature recommends a boil-off rate between 8 and 15% per hour. If you have significantly more you can create harsh tasting flavor components.

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Old 11-22-2007, 10:59 AM   #4
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Boiling water is 212°F or 100°C

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Old 11-22-2007, 02:20 PM   #5
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Quote:
Originally Posted by Chris_Dog
Boiling water is 212°F or 100°C
ROTFLMAO!!!! I was thinking the same thing...

Actually, it's not the temp as much as the time and volume (water to malt concentration)....
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Old 11-22-2007, 02:39 PM   #6
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realistically the only thing you need to worry about is dumping in a lot of extract and having it fall to the bottom of your pot, and scorch from the heat. that's why most recommend you turn off the heat, add the extract, mix it up, then turn the heat back on again.

Once you really exceed 212F (at sea level) its not boiling water...its steam

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Old 11-22-2007, 03:26 PM   #7
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The longer you boil extract-based wort, the darker it gets. This is only a problem if you are doing a pale. Anything from a Brown to a Stout, no one will notice.

I not only shut off the heat before adding extract, I take the pot off of the stand. Otherwise, I can get a scorch pattern that matches the stand.

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Old 11-23-2007, 04:18 PM   #8
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That's a good point David, especially if you're on an electric stove. Those coils stay hot, as do ceramic tops. gas range would probably be OK unless it has those honkin' thick burner grids...the thin ones are probably ok.

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Old 11-24-2007, 11:38 AM   #9
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I use a gas range for my boils, and never really have a problem with heat/burn issues. I used to turn the gas off, and move the pot when adding extracts, but have sinced just turned the gas down to the lowest setting. Nothing has burned on me yet.

However, during yesterday's brewing of a stout, I was doing a late addition of my DME with a pretty high boil temp, and I came darn close to a boil-over. I haven't come that close in a looooong time, but then again, never did I actually ever boil-over in my homebrewing past either!

Something to note though:

There are times when I am in the boil, and the wort feels to be sticking to the bottom of the pot, however it is not... I found that this is just the feeling of the boiling bubbles that form when doing an... um... BOIL! hahaha In any case, I stir frequently to play it safe.

5gB

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