3.5G boiled off?!? - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > 3.5G boiled off?!?

Thread Tools
Old 08-07-2012, 10:56 PM   #1
Aug 2012
Pittsburgh, PA
Posts: 5

Hello all...this is my first post...

I just collected 7G of wort from an all-grain brew....boiled for 90min....at end of boil, I was shocked to see that i was down to around 3G of wort! My boil was pretty intense, but I'm still shocked that I could boil off this much wort in90min! I was expecting around 1.5G boil off....not nearly 4!
I'm sure I could look this up in a chemistry book, but I thought you fine people would be a better way to go. Any thoughts? Am I existing outside the laws of thermodynamics?

Reply With Quote
Old 08-07-2012, 11:10 PM   #2
NervousDad's Avatar
Jan 2012
City of the Steamer
Posts: 1,252
Liked 277 Times on 185 Posts

I boil off 2.5+ in the winter for a 60 min boil, so I'd say that's pretty accurate if you had an intense boil. The average I would guess would be around 1.5 gallon an hour.

Reply With Quote
Old 08-07-2012, 11:13 PM   #3
worksnorth's Avatar
Apr 2011
Soldotna, Alaska
Posts: 684
Liked 64 Times on 50 Posts

Did you use lot's of hops too?

Reply With Quote
Old 08-07-2012, 11:17 PM   #4
Nov 2011
Nevada, MO
Posts: 245
Liked 11 Times on 11 Posts

Dude, turn the heat down. You want your boil off rate to be between 12-15% per hour. You just need a rolling boil not one that jumps out of the pot.
Beer is proof god loves us and wants us to be happy-Franklin

amandabab Likes This 
Reply With Quote
Old 08-08-2012, 03:11 PM   #5
TopherM's Avatar
Mar 2011
St. Petersburg, FL
Posts: 3,974
Liked 449 Times on 354 Posts

What pot do you have? Boil off rate is directly proportional to the surface area of the wort, so proportional to the diameter of your pot.

I boil off about 1.5 gallons in 60 minutes in a pot with a 13.5" diameter. If you are anywhere close to the same diameter, then you may be measuring incorrectly....
Primary #1 - Midnight Ryeder (Midnight Wheat and Rye)
Primary #2 - Florida Weiss
Primary #3 - Kane-DOH APA (Honey Citra APA)
Secondary #1 - Downtown Flanders Brown (brewed August 2012)
Keg #1 - Raspberry Florida Weiss
Keg #2 - Cinnamon Raisin Cider
Keg #3 - NONE!
Bottled - NONE!

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
How much is boiled off? Festmaster Beginners Beer Brewing Forum 7 03-09-2012 05:55 PM
Boiled with Lid on. Spartangreen Beginners Beer Brewing Forum 8 02-09-2012 03:23 PM
Under Boiled! BrewFrisco Beginners Beer Brewing Forum 1 01-10-2011 02:17 AM
Boiled Over AFBrewGuy Beginners Beer Brewing Forum 9 11-30-2008 08:54 AM
DME must be boiled? DJM Beginners Beer Brewing Forum 4 02-15-2008 12:17 AM

Forum Jump