JKoravos

Recipes 

It takes less than 10,000 btu to maintain a boil with 10 gallons, the bigger issue is how fast you can get the liquid to a boil. The more Btus you have, the faster you can bring the wort to a boil.

Lot's of people boil with 3500W electric elements. That converts to about 12,000 Btu. Of course, the electrical elements are near 100% efficient. Propane burners lose significant heat to the surroundings.

If you want to get away with as little Btus as possible, I'd highly recommend insulating your kettle with some high temp insulation and building a permanent wind screen for the burner.

springer

Recipes 

I have this one the KAB6


had do a little modification to get the flame closer but it will boil 15 gallons in under 50 minutes and its very quiet

On real low it will maintain a nice rolling boil



burner shot at medium flame



I really like this burner and when i go single tier I will get another burner sans frame and gut this one out

__________________
'The taxpayer: That's someone who works for the federal government but doesn't have to take the civil service examination.'- Ronald Reagan