That a online publication?
Based off my notes I have 1.042 preboil and 1.046 post boil. That sound right?
Only 4 points after an hour long boil doesn't seem right to me. When I used to brew inside, on my stove, it was a pretty solid 10 points my pre to post boil difference. Now that I've done my last 6 or 7 batches outside, on a stronger burner, my difference is more like 12-14 points (stronger boil off, stronger concentration, higher gravity)
Which are you more sure of, the 42 or the 46? If the 42 is right, then you got 95% like you said. If the 46 post boil is right, I'll
guess that your pre-boil was 34-36 which would make your efficiency 77-82%. Either way, sounds like it turned out pretty good.
I am pretty sure I hit 7 gallons right on the money and I calculated that amount prior to mashing and sparging. Now you got me second guessing my notes. :cross:
Uh, what? You calculated that you collected 7 gallons PRIOR to mashing and sparging? The sparge water
in is usually pretty darn close to the sparge water you get
out. Your strike water for the mash will be significantly less out than what you put in. Off hand, if you mash with 5 gallons, you're probably only going to get 2-3 gallons of wort out (don't hold me to those numbers, but it's something like that).
So, let's say you mashed with 5 gallons of water, got 3 gallons out. Maybe you need 7 gallons of total volume, so you do your two 2 gallon sparges (or one four gallon sparge, whatever), now you've got your 7 gallons. Is that what you mean your total volume came from? Or are you talking about the total volume you used?
Based off the information above...what is the forumula to figure out my brewhouse efficiency?
I'm not really keen on the "brewhouse efficiency". To me, all that is important is what I'm getting out of my mashtun and that it is consistent. I used to worry "zomfg I didn't get 99.99% eff" or whatever. I've got my system dialed in and I get a solid 78-82% efficiency. I think most people are satisfied with 70% or better, but to me its just important to get roughly the same number each time. (Yes, Saccromeyecyessesese, I no you no sparge and are happy with the lower efficiency, because it saves you 20-40 minutes on your brew day)