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Old 01-27-2012, 02:10 PM   #1
wncbrewer
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Default which coil for my herms

I have two coild laying around and I can't decide which to use for my heat echanger on my upcoming herms build. One is 1/2" copper about 30 feet long and the other is 1/4 " stainless about 50 feet long. I like the idea of the stainless one, but I'm am afraid 1/4 is gonna be too small.

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Old 01-27-2012, 02:15 PM   #2
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Originally Posted by wncbrewer View Post
I have two coild laying around and I can't decide which to use for my heat echanger on my upcoming herms build. One is 1/2" copper about 30 feet long and the other is 1/4 " stainless about 50 feet long. I like the idea of the stainless one, but I'm am afraid 1/4 is gonna be too small.
I'd go with the 1/2" copper. Heat transfer through copper is better, and like you said 50' of 1/4" is too small and will restrict your flow a lot.
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Old 01-27-2012, 02:22 PM   #3
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My herms is 3/8", I wouldn't go any smaller than that. It is actually the perfect size, I can run my pump wide open to recirculate, no fiddling with flow rates.

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Old 01-27-2012, 02:30 PM   #4
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Thanks, I was leaning towards using the copper anyway, but this settles it

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