wireless controlled heat/cool vents

This sounds interesting, a company called keen has an indiegogo project to build wirelessly controlled vents for shutting rooms off for heating/cooling.  This sounds pretty neat.  Looks like between 130–150 for 4 vents, so 4 rooms.  Vents are about 8 bucks, motor and controller, another 20, wireless 10…so say $40 in material?  not a bad price.

http://techcrunch.com/2013/04/29/keen-home-launches-crowdfunding-campaign-for-its-connected-central-heating-and-cooling-vents/

http://www.indiegogo.com/projects/keenvent