RecPro by Houghton
Several decibels quieter
Moves more air per minute
More btu of cooling per watt
Heat & Dehumidifier included
*NOT the lowest price
We chose model A3800, with Heat & Dehumidifier
EDIT: Reread OP. Not 12v. Houghton is 120v. A quality 12v would be the ($expensive?) set up the factory installs. ProAir, Trans/Air, Carrier, Thermo King. Check out Eberspaecher