So I picked up a couple of 50' rolls of 5/8" OD X 1/2" ID copper tubing from Home Depot very cheaply and was thinking of making a CFC. I like the fact that I would have full flow of wort through the CFC for whirlpooling, and the chance of plugging the chiller with pellet hops would be mitigated quite a bit. But I have some concerns regarding the performance of this since I only see 3/8" ID CFC's on the market. Would a 1/2" ID CFC work well? Better than a 3/8" CFC? How long should the CFC be? How large of an ID should the Outer Jacket be?
Thanks all for any opinions or commentary!