DannyW wrote:One thing that might not scale linearly is your boiloff rate. I image it will vary based on lots of factors (kettle shape, burner capacity, kettle metal) , so you will have to experiment to find out.
When I make 2x5 gallons, I have to run off about 14 gallons. When I make 1x10 gallons, I only run off about 12 gallons.
If you are using the same kettle for this as for your 5 gallon batches, your volume of boiloff per hour will remain the same since it is a function of surface area. Your boiloff rate as a percentage of volume will cut way back.
If you are using a different kettle that you have not used before, then you will need to just make a wild assed guess as to the boiloff rate.
Wayne
Bugeater Brewing Company