Touch screen 7 Day Programmable Thermostat — RTH8500D • User-friendly interaction • Large touchscreen display with backlight • 7-day programming Honeywell’s touch screen 7-day programmable thermostat provides maximum flexibility for busy lifestyles. You set it up to adjust the temperature when you are away or asleep during times when you don’t necessarily need to heat or cool
• User-friendly interaction
• Large touchscreen display with backlight
• 7-day programming
Honeywell’s touch screen 7-day programmable thermostat provides maximum flexibility for busy lifestyles. You set it up to adjust the temperature when you are away or asleep during times when you don’t necessarily need to heat or cool your home to optimum comfort, and your heating and cooling equipment runs less. The RTH8500D features a green backlit touch screen interface with simplified programming and easy to follow text instead of symbols. Exclusive Honeywell Smart Response Technology continually adjusts the pre-heating/cooling of your home so you are comfortable at your programmed times. It also automatically determines if your home needs heating or cooling to provide maximum comfort. Universal compatibility means it works with virtually all system types.
Features: 7-Day Programming — allows separate programming for each day Display — straightforward display keeps operation and programming simple Backlit Display — easy-to-read, even in dimly lit rooms and hallways Smart Response Technology — continually adjust the pre-heating/cooling of your home so you are comfortable at your programmed times Filter Change Reminder — keep your heating/cooling system operating at peak performance Vacation Hold — option to adjust your program and have it automatically resume the normal settings in time for your return Permanent Day and Time — your settings are always maintained; even during a power outage Daylight Saving Time (optional) — adjusts the time automatically Compatible — with heating and cooling plus heat pump systems Does not work with electric baseboard heat (120-240 volts). 1-year limited warranty 
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Vacation Hold Feature – Worth Considering I have both the Honeywell RTH7600D (bought at Costco for around $65 and packaged there as model RCT8101A) and this Honeywell RTH8500D. Both units are very good with the one major difference being the “Vacation Hold” feature; the 8500 has it and the 7600/Costco version does not. The programming interface is different as well, however, one is not necessarily better than the other. The 7600 unit is a little easier to program whereas the 8500 offers a shortcut that allows multiple days to be…
Works even on older/non-standard units. I had trouble finding programable thermostats that would control my split system Carrier heat pump. Honeywell has the installation manuals for every one of their units online ([…] I spent time looking at this unit’s documentation to be sure it could handle my Carrier unit. Be careful, many Honeywell and other manufacturers have units that don’t handle heat pumps, and some include “call a professional” in their instructions. Setup was a cinch and the ability to program temps…