Honeywell RTH9580WF Wi-Fi Smart Thermostat Review


The Honeywell RTH9580WF was built as a direct competitor to the Nest learning thermostat.

Although the Honeywell Lyric was later released as a more advanced version with sophisticated features to compete with Nest 3rd Generation, the RTH9580WF is still popular to many people.

And this is why:

You don’t have to be tech savvy to operate the Honeywell RTH9580WF smart thermostat. Yes, it does come a with Wi-Fi access capability, a smartphone app, and touchscreen besides being programmable.

However, all these features have been made as simple as possible. Is this a good or bad thing? Read on this review to find out.

Honeywell Wi-Fi Smart Thermostat RTH9580WF
  • Brand New in box. The product ships with all relevant accessories

User Interface

Nobody likes a smart thermostat with poor backlight or small readings –this type will give you a hard time viewing readings. Honeywell got this point right when designing the RTH9580WF smart Wi-Fi thermostat.

They went for a flat design that is sleek and doesn’t protrude much like the nest thermostat. In fact, this thermostat only has approximately 1-inch protrusion. Although I would have liked a smaller bezel at the bottom, the current screen size is still large enough, beautiful, and highly responsive. On the display, it shows:

  • Current date
  • Current time
  • Thermostat status,
  • Indoor and outdoor temperature readings
  • Indoor and outdoor humidity control settings and level readings

You can even change its background color to match your home décor!


The RTH9580WF is compatible with heating, cooling, and heat pumps. However, if you have a heat pump with electric baseboard heat of 120-240v, then don’t buy this thermostat. Instead, you can choose from these Honeywell thermostats designed for baseboard heating systems.

Installing the Honeywell touchscreen programmable thermostat is pretty easy. Simply remove the existing thermostat, install the new one, and program it to match your preferred settings.

The Honeywell RTH9580 smart thermostat doesn’t require batteries as it draws its power from your heating and air conditioning system. Consequently, you need a C-wire. I have created a 3-minute read on understanding the C-wire that I hope it will guide you in the installation of this thermostat.

If you can’t spare 3 minutes to go through that article, here are quick questions to help you determine if your heating system is compatible with this thermostat. If you answer yes to any of these questions, then your system is compatible.

  • Does your current thermostat have 110V or higher written on it?
  • Do you have a wire connected to terminal labeled “C”?
  • Do you have an extra wire that is not connected to any terminal on the thermostat wall plate?
  • Do you have a wire connected to terminal labeled “G”?
  • Otherwise, if your thermostat has thick wires that are connected using wire nuts, it is not compatible.

Here is also a video to guide you through the installation process.

Honeywell RTH9580WF Installation Video

Features & Performance

Customizable color touch-screen

This Honeywell thermostat won’t mess up your décor thanks to its high-definition customizable screen that can display any color you choose. Whether you would like to match your home décor or change the color to a desirable mood, simply adjust the background color on the settings.

Wi-Fi Capability & Dedicated App

The Honeywell RTH9580WF connects to your Wi-Fi to relay real time temperature and humidity data directly to your iPhone no matter where you are. You will now access your indoor and outdoor temperature and humidity data remotely that is after installing the highly rated Honeywell app.

With this app, you will also get extreme temperature alerts as well as filter change reminders. The app is beautifully designed and more accurate that what you get with the La Crosse temperature and humidity alert sensors. If you don’t have an Android smartphone or an iPhone, you can use your computer to log in to the Honeywell official website where you will view this data. The app is also compatible with other Honeywell models in this range including the TH9320WF5003. Both the website and smartphone app show a 7-day weather forecast.

To get more value from the remote accessibility, setup e-mail alerts to be notified of things such as when the temperature or humidity exceeds or falls below your preferred level, when the connection is lost with Honeywell servers, a change in command hasn’t registered, and when the thermostat has started working normally after a downtime.

Programming and Scheduling

You can program the RTH9580WF depending on the environment it is to be used. Choose the temperature you need it to revert to whenever the building is occupied and it will adjust accordingly to combat the cold mornings and warm afternoons.

If you are using it at home, this programmable thermostat can be programmed to adjust temperatures to what you prefer when you wake up or come back home in the evening. With this Honeywell smart thermostat programmed, you will never have to worry about adjusting temperatures manually. As you use it, the RTH9580WF will learn your schedule and take over the duties of maintaining a preferable temperature throughout.

Other features worth mentioning

One of the most impressive things in the RTH9580WF is its big display. Unlike other thermostats, you can view the temperature and humidity readings without moving closer. Other readings displayed on the screen include the date, time, outdoor humidity, indoor humidity, and the status.

You can also view the fan control information and set your preferred temperature and humidity on the go. Even better, this thermostat will show you a weather forecast for the next 7 days!

If you have that quick-learning child who would be curious about the elegant thermostat and would want to play with it, don’t worry about your settings getting tampered with. Honeywell RTH9580 smart thermostat’s security features allow you to lock the settings and options screen with a password preventing unauthorized persons from accessing it.


  • Works with Alexa
  • Intuitive and functional iPhone and Android app
  • E-mail alerts of disruptions or the deviations from schedule
  • Simple programming yet delivers exceptional heating and cooling automation
  • Advanced fan settings and temperature regulation
  • Indoor humidity sensor and outdoor humidity reports
  • Shows a 7-day weather forecast
  • Energy saving features

Selecting the programmable mode on this Honeywell thermostat will actually save you on heating and cooling costs.

The Honeywell RTH9580WF Wi-Fi smart thermostat sits rightly between the advanced smart thermostats and the reliable programmable thermostats. It is efficient and quick to learn your schedule. You can program it so that it follows a specific heating and cooling schedule every day of the week. At its current price, it is safe to say that it is one of the few programmable thermostats that give real value for money.

Honeywell Wi-Fi Smart Thermostat RTH9580WF
  • Brand New in box. The product ships with all relevant accessories