HoneywellTH8320R1003, White, 10 sq. in

Product as expected - packaged well for shipping and time frame great.

Wow! We have a 2-story house with a dual zoned HVAC system (2 thermostats to control upstairs and downstairs independently through adjustable dampers with only 1 air conditioner). We have had major problems with consistent air temps in the upstairs since we moved in. The 2 bedrooms in the front face the sun all day and have lots of large windows. Those rooms get HOT when it's sunny outside. The 2 bedrooms in the back are comfortable or even cool. The thermostat is located in the hallway right beside the stairwell, where all the hot air from downstairs rises. To make matters worse, it's feet away from the laundry room. We tried everything...spent $1000 to get the windows tinted in the front bedrooms, bought black-out curtains, had the air people come out and adjust our dampers multiple times and install some sort of blower for the room at the end of the run. Finally, we bought this thermostat with 4 sensors, 1 to go in each bedroom. We had our air people install it since we're still within our 1 year warranty, and they did it for free. This setup is amazing! We have it take the average of all the rooms, and now we get a very consistent temperature, even in the hallway. We stuck the sensors on the walls using medium command strips (the ones that are like Velcro), so it will be easy to pull off and change batteries when we need to. The thermostat is great because you can set a range of temperatures (minimum of 2 degrees apart), and it will automatically change from heat to air conditioner. Right now it's nearing spring, so it gets warm enough for the air conditioner during the day but cool enough for heat at night. I used to get up cold in the middle of the night and turn the heat on. Now, I set it for a range of 69-71. The air conditioner cools it if it gets above 71, but when it gets cooler at night and drops below 69, the heat kicks on. So amazing!!!Also, our HVAC guy recommended we buy the thermostat used. He said you'll be able to tell if it works or not instantly when you connect it, and Amazon's return policy is excellent, so it's worth the chance. We bought one in good condition on Amazon for $100 less than a brand new one, and the battery tab hadn't even been pulled out. Saved us a lot of money and hadn't ever been installed before!

I have ordered approximately 16-18 of these thermostats now. Product arrived as advertised, all serial numbers inside thermostats were dated new.

I'm updating my review in part of the product and in part due to the vendor. The first thermostat I got never worked correctly. Amazon refused to help as it was over 30 days when I contacted them. They referred me to Honeywell to make a warranty claim. Honeywell said I had no warranty as I had not had an authorized Honeywell installer put it in. There is nothing in the warranty info for this product which says anything about who installs it or length of warranty. Luckily, an Amazon rep had given me the contact info for the vendor. I contacted him and he went well out of his way to get me a working thermostat. The vendor, Ginko Magic, gets 5+ stars, Amazon and Honeywell get none. The thermostat, one that has all it's parts, works well. The app is simple and straightforward. If you have a need to control or check the heat/AC while away from home, it does the job. Please note, it does require it's own router which needs to be purchased separately. To get clarity from Honeywell, I will send a letter to their CEO to get their warranty position in writing.

I was replacing this exact model thermostat and nothing else would do unless I wanted to also replace the control module that the air handler is attached to. The setup in my case has the air handler wired to a Honeywell control module and since the existing control wire going from the air handler closet to the thermostat only has a few wires, the installer setup the module to be wireless controlled by this thermostat and the wires running to it are only used to supply the thermostat with 24v AC to power it. I was replacing it due to the old one intermittently going blank for hours at a time. This replacement works perfect and was at a good price.