wrote in message
...

....

How about a Crawlspace Smart Vent?

http://www.smartvent.net

They cost $365, but they only use 40 watts when moving 290 cfm of air
out of a basement when the absolute moisture content of basement air
is greater than the absolute moisture content of outdoor air.


Does that mean when the absolute moisture content is the same (high or low)
it does noething? Seems like it would have limited value in a naturally
humid region whee you want to make it lower.