lostboysbrew
Well-Known Member
Greetings fellow brewers..........
So its been boggling me all week, and I need an answer. Typically my friends and I brew 10 gallon batches, infact since going all grain that is all we have done. We are always right around 80% efficiency. Last week we did two "small" batches of 5 gallons. We followed the same steps, same as we always do......but we missed our OG's by alot! I am talking almost .020 points....after adding some sugar to the boil we were able to cover that spread a little but what gives???
Talking to some people at our homebrew meeting someone else said they had that issue and they were thinking it had to be something with thermal mass. The fact the mash tun was only half full versus full. Our setup is a 10 gallon converted cooler and 24lbs of grain gets us just below the top, perfect size. However, the 5 gallon batch was only half (obviously).
Anyone have any ideas, or know why??? If indeed it is this thermal mass theory, can someone explain this?? Perhaps how to counteract it???
Thanks!!
So its been boggling me all week, and I need an answer. Typically my friends and I brew 10 gallon batches, infact since going all grain that is all we have done. We are always right around 80% efficiency. Last week we did two "small" batches of 5 gallons. We followed the same steps, same as we always do......but we missed our OG's by alot! I am talking almost .020 points....after adding some sugar to the boil we were able to cover that spread a little but what gives???
Talking to some people at our homebrew meeting someone else said they had that issue and they were thinking it had to be something with thermal mass. The fact the mash tun was only half full versus full. Our setup is a 10 gallon converted cooler and 24lbs of grain gets us just below the top, perfect size. However, the 5 gallon batch was only half (obviously).
Anyone have any ideas, or know why??? If indeed it is this thermal mass theory, can someone explain this?? Perhaps how to counteract it???
Thanks!!