Install your thermostat within minutes with Easy DIY Install Wizard
Never installed a thermostat before? Don’t worry, we’ve got you covered! With our intuitive Easy DIY Wizard, thermostat installation will be a breeze. This interactive wizard walks you through installation and setup with clearly illustrated, step-by-step instructions. Simply follow the prompts to get your customized installation instructions. Plus, this thermostat also features built-in level, universal back plate and a simple setup menu for easy installation.
And scheduling is covered too
With its 7-day and 5-1-1-day scheduling option, this thermostat lets you lets you create your home heating and cooling schedules to fit your lifestyle. You can set your custom schedule or use the preset schedule for maximum energy efficiency.
- Large, easy-to-read backlit display
- 7-day or 5-1-1 day programmable schedule
- Four programmable periods for each day - wake, leave, return and sleep
- Automatic heat/cool changeover option
- Dual fuel control eliminates the need for an outdoor sensor
- Filter change reminder
- Keypad lockout
This thermostat does not work with:
- Line voltage (110V / 220V baseboard heating)
- Proprietary/ communicating/ serial protocol
Built with compatibility in mind
This thermostat is designed to work with existing wires in your home, and features extensive compatibility with heating, cooling and heat pump systems.
- Conventional (2H/2C) - Up to 2 stages of heating and 2 stages of cooling
- Heat Pump (2H/1C) - Up to 2 stages of heating and 1 stage of cooling
- Heat only and Cool only
- Gas, Oil, Electric applications
- Millivolt and 3-wire zone valve systems
Enjoy home comfort without breaking the bank
Now you don’t need to choose between saving money or staying comfortable. When you use the programmed heating and cooling schedules, you can instantly start saving on your HVAC related energy costs.
Reliable temperature control
With its precision temperature accuracy of 1 degree, this thermostat gives you the option of keeping your home temperatures within one degree of where you set it. It’s time to start expecting more from your thermostat.
Our experience makes a difference
For more than 75 years, Emerson has leveraged thermostat expertise to bring you thermostats with reliable quality and top functionality. In fact, the HVAC system in your home probably depends on our parts and products to keep it running smoothly.
Thermostats that fit every need
The 80 Series thermostats are the perfect fit for every application. The standard footprint makes replacements and upgrades easier than ever without leaving visible marks on the wall from the old thermostat.
 1F85U-42PR |  1F85U-22PR |  1F83H-21PR |  1F83C-11PR | |
|---|---|---|---|---|
| Customer Reviews | — | — | — | — |
| Price | — | — | — | — |
| Compatibility | Multi-stage (4H/2C) | Multi-stage (2H/2C) | Heat pump (2H/1C) | Single-stage (1H/1C) |
| Precision temperature control | ? | ? | ? | ? |
| Backlit screen | ? | ? | ? | ? |
| Auto-changeover | ? | ? | - no data | - no data |
| Keypad lockout | ? | ? | ? | ? |
| Filter change reminder | ? | ? | - no data | ? |
| Easy DIY install wizard | ? | ? | - no data | - no data |
Install your thermostat within minutes with Easy DIY Install Wizard
Never installed a thermostat before? Don’t worry, we’ve got you covered! With our intuitive Easy DIY Wizard, thermostat installation will be a breeze. This interactive wizard walks you through installation and setup with clearly illustrated, step-by-step instructions. Simply follow the prompts to get your customized installation instructions. Plus, this thermostat also features built-in level, universal back plate and a simple setup menu for easy installation.
And scheduling is covered too
With its 7-day and 5-1-1-day scheduling option, this thermostat lets you lets you create your home heating and cooling schedules to fit your lifestyle. You can set your custom schedule or use the preset schedule for maximum energy efficiency.
- Large, easy-to-read backlit display
- 7-day or 5-1-1 day programmable schedule
- Four programmable periods for each day - wake, leave, return and sleep
- Automatic heat/cool changeover option
- Dual fuel control eliminates the need for an outdoor sensor
- Filter change reminder
- Keypad lockout
This thermostat does not work with:
- Line voltage (110V / 220V baseboard heating)
- Proprietary/ communicating/ serial protocol
Built with compatibility in mind
This thermostat is designed to work with existing wires in your home, and features extensive compatibility with heating, cooling and heat pump systems.
- Conventional (2H/2C) - Up to 2 stages of heating and 2 stages of cooling
- Heat Pump (2H/1C) - Up to 2 stages of heating and 1 stage of cooling
- Heat only and Cool only
- Gas, Oil, Electric applications
- Millivolt and 3-wire zone valve systems
Enjoy home comfort without breaking the bank
Now you don’t need to choose between saving money or staying comfortable. When you use the programmed heating and cooling schedules, you can instantly start saving on your HVAC related energy costs.
Reliable temperature control
With its precision temperature accuracy of 1 degree, this thermostat gives you the option of keeping your home temperatures within one degree of where you set it. It’s time to start expecting more from your thermostat.
Our experience makes a difference
For more than 75 years, Emerson has leveraged thermostat expertise to bring you thermostats with reliable quality and top functionality. In fact, the HVAC system in your home probably depends on our parts and products to keep it running smoothly.
Thermostats that fit every need
The 80 Series thermostats are the perfect fit for every application. The standard footprint makes replacements and upgrades easier than ever without leaving visible marks on the wall from the old thermostat.
1F85U-42PR |  1F85U-22PR |  1F83H-21PR |  1F83C-11PR | |
|---|---|---|---|---|
| Customer Reviews | — | — | — | — |
| Price | — | — | — | — |
| Compatibility | Multi-stage (4H/2C) | Multi-stage (2H/2C) | Heat pump (2H/1C) | Single-stage (1H/1C) |
| Precision temperature control | ? | ? | ? | ? |
| Backlit screen | ? | ? | ? | ? |
| Auto-changeover | ? | ? | - no data | - no data |
| Keypad lockout | ? | ? | ? | ? |
| Filter change reminder | ? | ? | - no data | ? |
| Easy DIY install wizard | ? | ? | - no data | - no data |