Yes they are computer cooling fans, I bought one for my computer case from staples for $7 or $8. But these have a nice case they are mounted in with a switch that can easily be attached to cooling fins. When I factor in gas and local tax, it isn't worth my time and energy trying to save a couple $$. Factor the cost over 7 years even makes it less appealing. I've been a MacGyver my whole life and have found there are some things not worth the time to MacGyver. If a person can afford an expensive RV, they should be able to afford $23.06 for a nice dual cooling fan. That's barely 50 miles of traveling at the price of fuel LOL.
Beside the guy I bought from carries a complete line of repair parts for RV refrigerators etc, many at substantial savings. He has got to make a buck too!
Thanks though for letting all the MacGyver's out there know that alternatives are available.