My setup is Kal clone but with 3 keggles. I unusually brew 10 gallon batches. Boil kettle is the one item I wish I could replace sometimes. I had a boilover once which made a mess but once you get past the hot break it's ok.
Really depends on how much beer you want to make, how long of a boil you want to have, how vigorous a boil, and so on.
I recommend a 20 gallon boil kettle to make 10 gallons of finished product because of all the losses along the way. I try and end up with 11.5 to 12 gallons into the fermenters and then 10 gallons into the kegs.
I often make hoppy beers where a lot of wort is soaked up in the boil, my boil is vigorous and sometimes 90 mins which means I need to start with 14.9 gallons (give or take). Boiling 14.9 gallons in a 15 gallon container just can't work.
Kal
whats the process with a 15 gallon hlt isn't that the main issue when trying to do 10 gallon batches with the keggles? do you stop recirculating when you get your mash ready then add water to hlt, take it up to correct temp then start recirculating again?
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