Author Topic: Repeatable Boil Off  (Read 1619 times)

Offline natebrews

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Re: Repeatable Boil Off
« Reply #15 on: November 12, 2016, 04:39:57 PM »
Mostly tears and regret. 

But seriously, I just have some marks that I hammered into the side of the kettle at the gallon marks so I can look and see.  I put them on 2 sides so I can average if things are crooked. 

All in all, I don't worry about a couple points.  I doubt that most people could taste the difference in a modest difference (2 or 3 gravity points) in most normal strength beers.
Risk of failure should be no deterrent to trying.

Offline 802Chris

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Re: Repeatable Boil Off
« Reply #16 on: November 13, 2016, 12:37:27 PM »
Boiloff rate truly is a little bit variable.  When I have 20-30 minutes left in the boil, I check the volume and how close it is to what I expected.  If too low then I consider whether to add more water to allow a longer boil or whether to start adding my late hops right away and shorten the boil.  And vice-versa, sometimes I have to plan for a longer boil.  In either case it doesn't affect the bittering significantly in most cases, but could affect timing of the late hops.

+1 here. Had to do it yesterday in fact when I undershot OG by over sparging. I also noticed a big swing in boil off rate my last few brews, now that the temperature is lower along with the humidity (Vermont)

The Beerery

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Re: Repeatable Boil Off
« Reply #17 on: November 13, 2016, 01:02:52 PM »
I boil inside in my brewery which is always 66f and 34% humitidy(it has its own thermostat/huminidfier). I also use a special cut lid, and the same pid power on my element every time.  99 brews out of 100 I am within 2oz of volume and sub 1 sg point. So it is possible. Just takes some work!
« Last Edit: November 13, 2016, 01:05:46 PM by The Beerery »

Offline Phil_M

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Re: Repeatable Boil Off
« Reply #18 on: November 13, 2016, 05:33:43 PM »
Yeah, my old electric system that I used in the garage had no issues with repeatable boils. But it was out of the wind, and at least partially climate controlled...but lack of a decent ventilation meant it got damp...and the damp was bad for the car tools, let alone the structure.
Corn is a fine adjunct in beer.

And don't buy stale beer.