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Thermostat Compatibility Guide
Honeywell Compatibility Checker
Use to determine if an Honeywell thermostat is compatible with your heating and cooling system.
Go to the Compatibility Checker
Compatible Systems
Note: Use this table for reference only. For a more definitive answer on your system’s compatibility, please use the compatibility checker above.
| Compatibility | Honeywell T9 | Honeywell T9 with Sensors | Honeywell Smart Color |
| Natural gas, oil |
✓ |
✓ |
✓ |
| Electric heating |
|
|
|
| Single stage heating and/or cooling |
✓ |
✓ |
✓ |
| Single stage heating with two stages of cooling |
✓ |
✓ |
✓ |
| Two stages of heating with one stage of cooling |
✓ |
✓ |
✓ |
| Single stage heat pump with/without AUX heat |
✓ |
✓ |
✓ |
| Single speed fan |
✓ |
✓ |
✓ |
|
Single stage heat pump with separate single stage furnace heating |
✓ |
✓ |
✓ |
| Single stage heat pump with separate two stage furnace heating (Dual fuel) |
✓ |
✓ |
✓ |
| Two stage heat pump with/without AUX heat |
✓ |
✓ |
✓ |
| Two stage heat pump with separate two stage furnace heating (Dual fuel) |
✓ |
✓ |
✓ |
| Humidifier or dehumidifier |
|
|
|
| Dual transformer systems |
|
|
|
| Two stages of cooling and two or three stage furnace heating |
|
|
|
| Two or three speed fan |
|
|
|
| PTAC systems |
|
|
Installation Help
Get more installation help with step by step videos.
Need more help with wiring, installing and setting up your thermostat?
Have a question about the C-wire?
If after reviewing the compatibility and installation information, you learn that an Emerson Sensi thermostat will not work for you, please consider the other smart thermostats available at our store.