all it needs is an up and down button to adjust the temperature. i could care less if that button is fancy or not, so long as it works and saves me real money, up front. if you really want to be more efficient, and have full access, look at systems like Nexia http://www.nexiahome.com from Trane/IR/Schlage and such. Much more complete systems, and not much more expensive than Nest. A lot more fun for a DIYer too.
6/24/12 at 10:10am