Quote:
Originally Posted by bestclimb
I like the idea of multiple paths of tubing. If only one tube is used it will be cooler at the start of it's run than at the end. Multiple paths means more even distribution of cool.
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That's not really true. Unless your flow rate is absolutely terrible, you won't have much of a temperature gradient between different points in the loop.
The reason to run parallel loops is to reduce over-all restriction so that your flow rate is higher, you aren't over-working the pump, and your rate of thermal exchange is improved slightly.