On Jun 17, 8:37*pm, Albert wrote:
I was looking on the Internet for some Window Wells to prevent dirt
from piling up near my crawl space vents. *Then I see something like
this on the Internet suggesting that the thinking is now to seal the
vents to save on energy and keep out moisture?

http://www.basementsystems.com/crawl...oducts/crawlsp...

What is recommended, to seal the crawl space vents or leave them open
for air flow?

Ventilation is very important. It is much better to properly insulate
the floor joists in the crawl space than to seal off the vents. That
is what they are there for.