Honeywell RTH9580WF Review

Honeywell RTH9580WF WiFi 9000 Color Touchscreen Thermostat Review

WiFi thermostat is an extremely useful high tech device for your valued house nowadays. Most of them allow users set regular temperature schedule in a day or remember yourself to control the house temperature remotely before going back home. But, you do not like to “program” the traditional sense of programmable thermostats because your timetable is unstable and have tendency to change frequently? Honeywell RTH9580WF WiFi 9000 Color Touchscreen Thermostat can meet your demand. For many people who are in a divided mind as to which thermostat branch should buy, I hope this Honeywell Wi-Fi Smart Thermostat RTH9580 review can help you to define exactly what you need.

Honeywell RTH9580WF Review

The good

Set the heating & cooling target temperature for all 7 days.

You have the option of an overall schedule including four scheduling points – 4 on and off cycles per day, so it can lower the temperature at bedtime, bring it back up when you wake up, drop temperature when you head to work and cut it back on when you return. Because each day also can be programmed individually, you can choose different on/off times for each, or just as a master schedule. Even if you don't set a schedule for your thermostat, the Honeywell will use algorithms to "learn" your habits and will begin to automatically adjust your heating and cooling based on your usage patterns. Of course, you can still override this by manually adjusting the temperature. The temporary overrides can last until the next scheduled temperature adjustment or permanently.

Learn the exact duration to reach your expected temperature

The Honeywell RTH9580WF thermostat can learn how long it takes your heating and cooling unit reaching the desired temperature and begin heating/cooling at the appropriate time in advance of your scheduled time. This smart thermostat even learns your heating and cooling cycle times to deliver just the right temperature, right when you want it. Meaning, if you set it to change the temperature at 6am and it took an hour or so to get to that temperature it will remember that the next time and start early so the temperature is reached at 6am (not an hour later).

The Honeywell Wi-Fi smart thermostat learns the exact amount of time necessary to reach your perfect temperature and acts accordingly, so energy isn't wasted and your comfort isn't compromised. This works well, but I’m glad there is an option to turn it off unlike most remaining scheduling thermostats, as sometimes I prefer to have my thermostat's behavior be 100% predictable with no smart "guessing".

Display useful information

You can see both indoor and outdoor weather parameters on the Honeywell screen like the air temperature, the humidity as well as the expected temperature.

Control over your house fan independently of programming

The advanced fan settings allow you run the fan on its own to keep you comfortable and save energy simultaneously.

Change your thermostat color

You can adjust the background color from an established list or use the custom menu to create your own color scheme.

Narrow temperature swing range

+/- 1 degrees: Honeywell says this thermostat can maintain one degree of accuracy on any temperature setting. That's great, but your heat or air conditioning will kick on more frequently as a result, so you can adjust it down whenever you want.

Remote control by application/ web browser

Being an intelligent model, this thermostat also gives you Wi-Fi connectivity to control it anywhere you are, be it across the room, or any where else that has a connection to the internet. This is done by downloading the free application known as the Total Connect Comfort. The Honeywell Total Connect Comfort Web application is very intuitive, works in exactly the same way (although the frequent log-outs are annoying) and even has more features such as:

  • View a full schedule overview (app only shows you one day at a time)
  • Set up to 6 notification email addresses. Email can receive alerts when your thermostat loses connection (suggesting a power outage) or your home’s temperature exceeds or falls below your pre-defined limits
  • Add additional locations, and thermostat for each location
  • Grant limited access to additional users. So if you have 2 locations, you could grant a babysitter access to only one of them by entering the user’s email address into your My Total Connect Comfort account
Honeywell RTH9580WF Review

The bad

Require C-wire

This thermostat requires a C wire for power, so it is not compatible with all systems. However, this is not necessarily a disadvantage as C-wire will provide a stable power source for your thermostat. If you need another wire for the C wire, just buy the Honeywell THP9045A1023 Wire Saver Module from Amazon for $16. It works perfectly, and was made to use with this and other Honeywell thermostats but is not referenced anywhere in the install guide.

One issue with this thermostat is that it will only connect to Wi-Fi with wireless "G". I'm sure that is why these are being discontinued. Just adjust your router to allow a "G" connection and you should be able to get it to work.

No motion sensor

Because Honeywell doesn’t use sensor, you need to touch the screen to wake up full brightness or remember to turn off your HAVC system in case you have urgent task to leave home earlier or get back later. However, using sensor definitely will add more cost for any thermostat.

No data reports

This system does not provide the energy-saving feedback that you can get with other smart products.


Honeywell WiFi Smart Thermostat RTH9580 can perform its tasks extremely well. It may exceed your expectations. The temperature adjusted automatically based on your typical heating and cooling cycle and the scheduling functionality also performed without any hiccups. The touch screen and application are both highly responsive and if Wi-Fi goes out, your thermostat will continue to function like a regular digital model. And I think the price (about $150-$170) is totally acceptable. Therefore, you would not feel regret after deciding to have this thermostat in your house!

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