Nest T200577 Learning Thermostat (2nd Gen) for $194.00 shipped after promo code HDHOLIDAY. Here is a screenshot for reference. This unique thermostat learns about the daily schedule automatically and adjusts itself according to the schedule. It also connects to the home wi-fi network so you can control it using various devices, such as a Smartphone, iPad, PC, or other tablets. This learning thermostat alone usually goes for about $199.