This looks tempting. I found a LHBS that has low prices for grain compared to what I've seen anywhere else. Sure it's Quebec grown grain, but I would be helping the local economy
What I'm not sure though are my calculations for mash/sparge and my ability to not overflow my pots. I have a two stockpots: 3.5 and 5 gal, so I really do not want (or have the possibility to for that matter) to venture into standard AG batches. With that in mind, I would be looking at 2.5 gal max.
Here are my calc for a standard 5.5% ABV pale ale (shooting for 65% efficiency)
Desired batch size: 2.5 gal
Boil-off rate : 1gl/h
Grain absorb. : 0,110 gal/lb
Grain bill: 6lbs
Mash const: 1,33 qt/lb
With that in mind I need 2.5 +1 = 3.5 final wort volume to nail my 2.5 gal batch goal post boil.
Mash water calc:
6lbs * 1,33 qt/lb = 8 qt = 2 gallons
2 gal - (6lbs*0,11gal/lb) = 1,34 gallons wort post mash
Sparge water calc:
3.5 gal - 1,34 gal = 2,16 gals
Now, everything seems to add up fine, but I still have my doubts. I would mash in the 3.5 gal pot (Green Bay Rackers gives me 2.48 wort volume, so I would have a gallon of headspace, tight, but doable), sparge in the 5 gal and boil in the 5 gal. Would 3.5 gal in 5 gal would pose a serious of risk overflowing ?
Thanks for the great tutorial