Editor’s note: Originally published December 2020. Reviewed and updated November 2026. Some models mentioned here may have been updated or discontinued since; check current availability and specifications before buying.
The Honeywell Vision Pro 8000 (TH8321WF1001) and Wi-Fi 9000 (TH9320WF5003) are both programmable Wi-Fi thermostats you can control from your phone or with Alexa. The 8000 is the more affordable, classic-looking option but is meant for professional installation. The 9000 adds a customizable color touchscreen, battery-free operation and a setup designed for do-it-yourselfers. Neither one learns your schedule on its own.
Quick answer
- Choose the 8000 if you’re paying for professional installation anyway, want humidity control features and prefer a plain gray display.
- Choose the 9000 if you want to install it yourself, like a color screen you can match to your decor, and don’t want to change batteries.
- Both are Wi-Fi enabled, work with Amazon Alexa, are programmable and list a 5-year limited warranty.
- Both need a C wire. Neither is a learning thermostat.
Honeywell 8000 vs 9000 at a glance
| Feature | Vision Pro 8000 (TH8321WF1001) | Wi-Fi 9000 (TH9320WF5003) |
|---|---|---|
| Display | Touchscreen, light gray background | Color touchscreen, 12 background colors |
| Wi-Fi and app control | Yes | Yes |
| Voice control | Works with Amazon Alexa | Works with Alexa and other smart home systems |
| Programming | 7-day | Programmable, with guided setup |
| Learns your schedule | No | No |
| C wire required | Yes | Yes |
| Batteries | Required | Not required |
| Installation | Intended for HVAC professionals | Designed for DIY |
| Extras | Humidity control, up to 3 heat/2 cool stages | Local weather adaptation, business mode |
| Warranty (listed) | 5-year limited, if installed by an HVAC technician | 5-year limited |
Installation is the deciding factor
Some differences come down to taste, such as whether you prefer a classic gray screen or a full-color one. The bigger practical question is who will install it.
The 8000 is intended for installation by an HVAC technician, and at the time of writing the warranty applied only to professional installation. If you’re paying for installation either way and don’t need the 9000’s extra features, the less expensive 8000 can make sense. If you’re a do-it-yourselfer, the 9000 gives you a more advanced thermostat without the installation bill.
The two models
Honeywell Vision Pro 8000 (TH8321WF1001)
The Vision Pro 8000 suits buyers who want Wi-Fi control without a flashy, high-tech look. It has a clean light gray background with sharp, easy-to-read digits, and it supports systems with up to three heating and two cooling stages.
You can control it remotely from a computer, smartphone or tablet: warm the house before you get out of bed, adjust it if you’re coming home early, or check that the temperature is comfortable for pets. It works with Amazon Echo devices for voice control, though the thermostat itself has no speaker or Alexa features of its own.
It offers 7-day programming, which suits households with different routines on different days, or you can skip programming and control it manually. You can override the schedule from the touchscreen or the app at any time. Its humidity control features can connect to a humidifier, or use a dehumidify function that slows the air conditioner fan to pull more moisture from the air.
This isn’t a DIY thermostat. It requires a C wire, and many of its advanced installer options are more complicated than most homeowners will want to handle.
Listed specifications
- Wi-Fi enabled
- Works with Amazon Alexa
- 7-day programmable touchscreen
- Up to 3 heat/2 cool stages
- Requires a C wire
- 5-year limited warranty if installed by an HVAC technician
Pros
- More affordable than many smart thermostats
- Lots of advanced options for the installer
- Humidity control, including a dehumidify function via the AC fan
- Classic, unobtrusive look
Cons
- Self-installation voids the warranty
- Complicated to set up on your own
- No wall plate to cover old screw holes or paint marks
- Cycles-per-hour setting and app are not intuitive
- Requires a battery
Honeywell Wi-Fi 9000 (TH9320WF5003)
The 9000 has a straightforward, boxy shape that recalls older thermostats, but its full-color touchscreen makes clear it’s a more advanced device. You can choose from 12 background colors to match your decor, and the screen includes a full keyboard for easy programming in Fahrenheit or Celsius.
It was designed to be easy to install and set up. An innovative terminal block lets you connect wires without a screwdriver, and on-screen, step-by-step setup means you shouldn’t need the manual. It doesn’t need batteries once installed, though it does need a C wire, which can make installation harder in homes without one.
You can program it from the screen or from a tablet, computer or smartphone using free apps, and it works with Alexa and other smart home systems for voice control. It can also monitor local weather and adjust heating or cooling accordingly, and it includes preset energy-saving heating and cooling cycles.
A business mode can be pre-programmed to know when a business will be closed over national holidays, so it’s suited to home or small business use.
Listed specifications
- Wi-Fi enabled
- Color touchscreen, 12 background colors
- Display size 3.5 x 4.5 inches
- Works with Alexa and other smart home systems
- Requires a C wire; no batteries needed
- 5-year limited warranty
Pros
- No batteries required
- Full-color display you can match to your decor
- Easy DIY installation and guided setup
- Works with smart home systems
- Weather-aware adjustments and business mode
Cons
- Difficult to install if you don’t have a C wire
- Boxy look may be too high-tech for some and not sleek enough for fans of Nest or ecobee
- Weather adaptation is less useful in areas with many microclimates
- Cannot learn your schedule like some other smart thermostats
Which should you choose?
- Honeywell 8000 if a professional is installing it, you want humidity control, and you’d rather spend less on the thermostat itself.
- Honeywell 9000 if you’re installing it yourself, want a color screen and battery-free operation, or need business-hours scheduling.
- Want a learning or more modern-looking thermostat? Neither of these learns your routine. Compare ecobee vs Nest, or see the Honeywell Lyric T5, which uses geofencing.
For more help, read our Honeywell thermostat buying guide or the general thermostat buying guide.
Bottom line
Based on the manufacturer’s features, the 9000 is the better all-round thermostat for most homeowners, especially if you plan to install it yourself. The 8000 remains a sensible, lower-cost pick when professional installation is already part of the plan.
FAQ
Can I install the Honeywell 8000 myself?
You can, but it’s designed for HVAC professionals, setup is complicated, and at the time of writing self-installation voided the warranty.
Do the Honeywell 8000 and 9000 need a C wire?
Yes, both require a common (C) wire.
Are these learning thermostats?
No. Both are programmable and can be controlled remotely, but neither learns your schedule automatically.
