Electric Brewing Supply 30A BCS Giveaway!


Home Brew Forums > Home Brewing Beer > General Beer Discussion > Boil off percentage
Reply
 
LinkBack Thread Tools
Old 03-31-2012, 08:01 PM   #1
eppo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2009
Posts: 466
Liked 5 Times on 5 Posts
Likes Given: 2

Default Boil off percentage

I'm just curious what you guys are using as your boil off percentage, if your using a keggle, or i guess any 15 gallon brew pot should be similar.
the default in beersmith is 9%, which for me is a bit low, i tried 12, and i think that's too high.
I'm going to try 11 this time, unless i get some sort of overwhelming response here.
Thanks

Joe

__________________
eppo is offline
 
Reply With Quote Quick reply to this message
Old 03-31-2012, 08:17 PM   #2
earwig
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
earwig's Avatar
Recipes 
 
Join Date: Feb 2010
Location: New Jersey
Posts: 827
Liked 22 Times on 20 Posts
Likes Given: 23

Default

It is really going to be trial and error (imo). The temperature outside and how vigourous your boil is play a part too. Good luck... I still suck at figuring this out.

__________________
earwig is offline
 
Reply With Quote Quick reply to this message
Old 03-31-2012, 08:17 PM   #3
duboman
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2011
Location: Glenview, IL
Posts: 6,219
Liked 488 Times on 452 Posts
Likes Given: 214

Default

The best thing to do is make a calibrated brew stick to measure your volumes pre boil and post boil for an exact measure.

Evaporation/boil off will be different depending on the conditions, cold dry is usually more and hot humid is usually less. You will have some variation also depending upon the depth and surface area of you Bk. I use a 10g BK that is as wide as tall and on average lose 1-1.25g per hour

Wort also shrinks as it cools so you need to calculate your shrinkage as well. It may take you a couple batches of measuring to get your average.

I actually created 3 different equipment profiles depending upon the season with the average appropriate numbers plugged in based on observed/measured results

__________________
Nothing Left to do but smile and drink beer.....

The Commune Brewing Company-Perfecting the "art" of beer since 2010
duboman is online now
 
Reply With Quote Quick reply to this message
Old 03-31-2012, 08:55 PM   #4
eppo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2009
Posts: 466
Liked 5 Times on 5 Posts
Likes Given: 2

Default

I did read that the boil off is a consant, so when I brew tomorrow I'm going to measure the exact boil off to use as a guesstimate.

__________________
eppo is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How do you take hydrometer readings before boil and post boil? phenry General Beer Discussion 7 06-01-2011 12:16 AM
Partial boil kits to Full boil Hockeyhunter99 General Beer Discussion 2 05-14-2011 02:45 AM
Really high boiloff percentage? mpruett General Beer Discussion 7 02-28-2011 03:28 PM
Pre-boil OG vs. Post-Boil OG bh10 General Beer Discussion 3 08-17-2010 05:42 PM
Split boil or boil later? TXCrash General Beer Discussion 1 12-25-2009 12:09 AM