Home Depot currently sells 27 thermostats. As of 2015, prices range from $19.98 to $276.95. The Honeywell RTH6580WF and the Honeywell RTH7600D are two of the highest rated by customers.
The Honeywell RTH6580WF is a Wi-Fi equipped unit with a free application available for iPhone and Android. It is adjustable on the touch screen or through the app. It is a seven-day programmable and saves an average of 33 percent on energy bills. The Honeywell RTH7600D is a seven-day programmable with an extra-large backlit touch screen display. It is battery-powered or hard-wired, and also saves you up to 33 percent of your energy bill.