Honeywell RTH8500D 7-Day Touchscreen Programmable Thermostat
Product Details
- Amazon Sales Rank: #3957 in Home Improvement
- Brand: Honeywell
- Model: RTH8500D
- Number of items: 1
Features
- Universal Application - works with conventional and heat pump systems up to 2H/2C, it's one thermostat for nearly every application
- Program is retained in memory in the event of a power outage Includes change reminders for filters and low batteries
- Separate programming for each day of the week - 4 periods per day
- Maximum comfort - Smart Response technology learns the amount of time a system needs to reach a desired temperature and adjusts accordingly
- Precise temperature control of +/-1 Degree for consistent comfort
Customer Reviews
Most helpful customer reviews
131 of 134 people found the following review helpful.
Vacation Hold Feature - Worth Considering
By Camera Shy
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 programmed at once. Since you'll likely program the unit infrequently, I don't think this should necessarily be a consideration unless you are an installer of these units where time is money; then the 8500 is the unit of choice.The Costco version for me is going back because it lacks the Vacation Hold feature. If you travel or not at home frequently, the Vacation Hold feature allows you to hold the temperature, say, at 50 degrees for 10 days while you take off for a ski trip. With this feature, once the timed Vacation Hold is over, the thermostat resumes it's normal programming schedule. So, when you arrive home, the house temperature is at a comfortable level.The Costco version allows you to manually override the program schedule, however, you must manually remove the override as well. Therefore, when you arrive home from your ski trip, you come home to a cold house and you'll need to manually reset the thermostat and wait for the house to warm up. If this is not an important feature for you or you're are at home most of the time, go for the Costco version and save about $40.Otherwise, the RTH8500D is an excellent unit that has worked quite well for me over the past several years.UPDATE: We recently (May 2011) installed the RTH8500D in our bedroom. The "click" of the relay contact when the thermostat calls for activation annoys my wife who has rather sensitive hearing. I contacted Honeywell and they said the clicking sound is unavoidable at the current time and suggested insulating the back plate of the RTH8500D with 1/8" Styrofoam to deaden the relay sound. I temporarily tried a thick folded piece of clothing material and I didn't notice any difference. After reading other Honeywell thermostat reviews, the clicking sound seems to be universal across many of their thermostats. So, if considering a bedroom application, you may want test the unit to ensure it's within an acceptable noise level .
36 of 39 people found the following review helpful.Works even on older/non-standard units.
By Starboard Home
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"
17 of 18 people found the following review helpful.Accurate, with every option and more
By W. Price
I wanted a touchscreen thermostat that accepted power from the furnace system so I didn't need to replace batteries every year. (It will run off of batteries if your system does not provide 24vac power to the thermostat; many were not originally installed to do so.)This model has practically every feature you could want in a standard thermostat. It's easy to install with a bit of careful reading and looks great on the wall. I like that you can set a temperature range (disabled by default; must set an advanced option to enable) and the unit will automatically switch between heat and cool to maintain the set range.Each of the 7 days of the week is individually programmable with up to 4 events (wake, leave, return, sleep). It offers advanced hold modes: 1) hold override temperature until next program event; 2) hold override permanently until canceled; 3) "vacation hold" for a number of days before automatically resuming the normal program.Another advanced feature is the "recovery" mode, where the unit learns how long it takes to heat/cool the living space and it can turn on the heater or air conditioner early so that it reaches the set temperature at the set time. Cheaper thermostats only turn on *at* the set time and then the temperature has to catch up to the program. This unit can anticipate your needs, so if you want it to be 75 degrees when you wake up at 7:35, set the wake-up event to 75 degrees at 7:35. It takes care of the rest.Highly recommended! I have three of these in my home, one for each zone.
Specification Of Honeywell RTH8500D 7-Day Touchscreen Programmable Thermostat
7-Day Touch Screen Thermostat - Easy Touchscreen programming for each day of the week. Compatible with Single Stage Heating and Cooling, Multistage Heating and ...
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