On Sat, 17 Oct 2009 13:39:38 -0700, the infamous "Stu Fields"
scrawled the following:

Oops, forgot to address this part:

I've thought about recirculating the air but don't have any heat transfer
data on the time required to heat up the container air in a circulating
environment. Should be an excellent place for heating water also...

Drop by your local library and grab some books on passive solar
heating and thermal mass. Note with a grin that most are from the 70s
and 80s.

--
The blind are not good trailblazers.

-- federal judge Frank Easterbrook