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I figure the recirculation might take care of much of the temperature variation issue. The liquid holds much more heat than the grain mass, so it should level out if you get good even filtration through the grain bed - and I'm not sure, but the copper piping might lead to a little more...

Looking at the problem, these are the variables that can be fiddled with: amount of available heat in the heating water, and amount of wort contact with the heating water. Each of those can be broken into a few of sub-variables: the amount of available heat can be varied by adjusting the...

In designing a recirc system, it seems like the ideal would be a large volume of hot sparge water which is used in a counterflow system with the wort. By minimizing the volume of water in 'contact' with the wort, you minimize the chance for overshooting temperatures, and maximize control, since...

I guess I misspoke - it's not that I don't have control over my water temp, it's more that I think it might be tedious to be frequently refiring the burner to keep the sparge water at the right temp for the length of a mash, and there's always the risk that I forget about it at some point and...

So, I'm thinking about how best (read cheapest) to go the HERMS route with my brewing, but to be honest I don't really know that much about it, save what I've been reading up on here in the forums. I'm trying to design something that uses the equipment I already have to the greatest extent...