We live in Evergreen Colorado at 8000' elevation with lots and lots of sun year round and especially from April - October when I don't have a use for all that good hot air being generated in my Solar Furnace.
I want to modify my system to be used in the summer as a solar hot water preheater. Conceptually I believe that it should work by simply circulating the hot air through a fabricated and insulated box enclosing a hot water heater tank installed in-line with my current natural gas hot water. The forced hot air from my solar furnace would heat the water in the tank and provide pre-heated water that would then go into my existing hot water system. I would appreciate your comments and suggestions...

Bill Braun