Sanity check - calculating brewhouse efficiency - Home Brew Forums

 Home Brew Forums > Sanity check - calculating brewhouse efficiency

12-12-2012, 01:00 PM   #1
Monkfish
Recipes

Mar 2012
New England
Posts: 88
Liked 5 Times on 5 Posts

Hi all - I'm looking for a sanity check here on what I'm doing to determine my efficiency.

My process right now is this:
1.) Mash and sparge. Upon completion of sparge, gently stir the wort and take a sample from the brewpot.
2.) Reduce sample temperature to somewhere in the 80* area (my arbitrary number) - take gravity reading and record wort temperature.
3.) Boil wort and chill.
4.) Stir the chilled wort well and take a second gravity reading and record wort temperature.
5.) Plug the numbers into an online calculator along with the grain bill (I had been using rooftopbrew's calculator)

Does this all sound right or do you do differently?

Thanks!
MF

12-12-2012, 01:12 PM   #2
Kahler
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Oct 2010
Astoria, NY
Posts: 357
Liked 24 Times on 17 Posts

Sounds fine to me.

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12-12-2012, 07:52 PM   #3
ajf
Senior Member

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Oct 2005
Long Island
Posts: 4,646
Liked 105 Times on 99 Posts

To calculate the brewhouse efficiency, you need to get an accurate reading of the volume of wort in the fermenter and the gravity of that wort. A calculator should then be able to calculate your efficiency, but you cannot do it without taking the volume into account.

-a.
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12-13-2012, 05:00 AM   #4
Monkfish
Recipes

Mar 2012
New England
Posts: 88
Liked 5 Times on 5 Posts

Quote:
 Originally Posted by ajf To calculate the brewhouse efficiency, you need to get an accurate reading of the volume of wort in the fermenter and the gravity of that wort. A calculator should then be able to calculate your efficiency, but you cannot do it without taking the volume into account. -a.
Thanks both of you for the responses. I have been factoring in volume into the calculations. I've been getting very low 80%s consistently since changing my crush to .037" - which was a better improvement than I had expected since reducing from the factory gap (and a very slow batch sparge.)

Much obliged.