In January, Honeywell contacted me about doing a review of their RTH9580WF Wi-Fi Smart Thermostat. I agreed and received the unit a few weeks ago, installed it, and have been using it for about 3 weeks. The following is my review of the product, and at the bottom, you’ll find giveaway information (Honeywell is giving one unit away to a lucky winner).

RTH9580WF Wi-Fi Smart Thermostat Review

Compatibility Test

The first thing I had to do before participating in this product review and giveaway is to make sure my current system is compatible with the new Honeywell thermostat. Honeywell provides an easy to follow guide on how to do this. You should check out this guide if you’re planning to participate in the giveaway (you have to verify that your system is compatible). Just as an FYI, my system doesn’t have the C wire, but has an extra wire that works with the thermostat — so I was good to go there.


honeywell thermostat boxhoneywell thermostat box open


Installation was a little more challenging. I tried to do it myself, but soon realized that the extra wire that I have wasn’t connected (so the thermostat won’t power up). I didn’t want to damage my HVAC system in the process of connecting my thermostat, so I called in the pro. He replaced my thermostat and re-configured the wiring in the basement…and viola…we are good to go!

honeywell thermostat power up

Once the system powered up, the next few screens walk me through the system set up and Wi-Fi configuration. It took me about 10 minutes to do the initial set up, including set up an account online and download the iPhone app.


iphone app
I upgraded from a very basic manual thermostat, so there are a lot of things that I like about this Honeywell unit.

  1. Control the thermostat from anywhere using a web browser…or my iPhone.
  2. Fully programmable 7 days a week.
  3. Run the fan on Circulate (which randomly turns on the fan for 15 minutes every hour).
  4. Shows inside humidity in addition to the temperature.
  5. Shows outside temperature and humidity.

To the right is a screen shot of the iPhone app, which happens to be my preferred way of setting up the scheduled. I find it the most user friendly option of the three (vs. set up on the thermostat itself and on the web).


As part of this review Honeywell is giving away one RTH9580WF Wi-Fi Smart Thermostat to a lucky winner. The giveaway is open to US and Canadian residents and your system must be compatible with the thermostat, check here. To participate, please follow the instruction below:

a Rafflecopter giveaway

Good luck!