marathon thermal storage tank
 

Is anyone using a marathon thermal storage tank? Just wonder how you like it? Does it have internal heat exchanger or is a external one needed for closed look glycol system? Thanks Gary

I've looked at them. I think a few people here are using them. The only thing I don't like about them is the price...

They are more expensive but I'm looking at replacing my regular water heater which is 12 and thought maybe I should replace the tank of my solar domestic heater right away since the tank is 7 years old. If I go Marathon I would think it is pretty much a lifetime tank. This domestic system I had installed which is 2 4x 10 ft helodyne panels. Then 4 years ago I built my 12 x 40 ft system for heating.

I think this is a cutaway of the unit. Don't know if it helps. I know Richard here use (sells) them.

http://tackyted.com/storage/solar/Wa...terCutView.jpg

BTW did live in Milwaukee for years before moving South 10 year ago. Do goto Iola in the summer for the car show.

You have to be really careful with max temps from solar with this tank. It is not as high as a glass lined or SS tank.