No, not Washington DC fans... Are there any of those?

I'm looking for a fan that I can use to inflate my greenhouse. I can
find AC inflation fans aplenty. Heck, I already have two of them...
But a DC fan would be more efficient, and work well with my backup
greenhouse power. Anybody ever seen something that would work?
Googling is getting me nowhere.

Thanks

Rob

--
Rob's Rules: http://www.msu.edu/~halgren
1) There is always room for one more orchid
2) There is always room for two more orchids
2a. See rule 1
3) When one has insufficient credit to purchase
more orchids, obtain more credit
LittlefrogFarm is open - e-mail me for a list )