Home Depot offers the 2nd-Generation Nest Learning Thermostat
, model no. T200577, for $199. Coupon code "HDHOLIDAY" drops them to $194
. With free shipping
, that's $5 under our September mention and the lowest total price we could find by $5. It "learns" how you set your home's temperature, downloads data, and can be controlled from your smartphone (via WiFi). Note that not all home HVACs are Nest-compatible; click here
to see if it will work with yours.