- Oct 3, 2007
- 1,539
I was searching around online for information on indirect hot water tanks for DHW with two heat exchangers (one for the boiler one for solar) and was pretty surprised by how expensive they can be. Basically $1000 and up from what I saw. Has anyone done their own indirect tank? I was thinking that a 100-150 gallon propane tank properly insulated and fitted with a pressure valve, etc...would probably work pretty well. Of course, the labor, heat exchangers, etc...could end up exceeding that $1000 cost. Anybody have any good ideas?