HERMS suggestion: What to use for the heat exchanger

Have a question or want to show off your project? Post it! No Registration Necessary.  Now with pictures!

Any of you HERMites out there have a good suggestion for the heat exchange
portion of the setup?

I'm eyeballing a 5 gallon water heater at Sears. have also been on the hunt
for a smaller "commercial" coffee maker wondering if that might make a good
heat exchanger.. no luck so far...




Site Timeline