What to use for fans in a solar kiln

[Doc]

Should I use attic fans (a pair)?

I know I need to think about all metal contruction, as I don't want the things to melt down. But how much airflow do I need here (cfm)?

Doc

[Lorax]

Doc,

This doesn't answer your question but I have some related questions, so I thought I'd post them in your thread.

I plan on building a solar kiln later this spring that will hold between 700 and 1000 board feet, but I do not have access to the electric grid.  My idea was to use a solar panel and a battery bank (3 deep cycle marine batteries in parallel) along with 1 or 2 12-volt fans that came from a car's cooling system.

On the weekends, when I am on site, I could charge the batteries with my 1000 watt gas generator if the solar cell can't produce enough power to keep the batteries fully charged.

Do you think such a set-up will work?  Any suggestions are welcome.

Thanks in advance,
Al

[TomFromStLouis]

air flow calculation tips are covered in articles on www.woodweb.com. Search for solar kiln and set aside an hour or so to read and learn.

I used attic fans that kick on when the temp gets just so.

[Carl_B]

I used eight inch  Duct booster fans  in my kiln.  They called for one fan for every four feet of length A fan with 300 cmf for ever four foot of length in a 1000 B.F. kiln