MTronic Smart Thermostat is not compatible with the following systems:
| System Type | Explanation | Identification |
| Proprietary Systems | Enterprise systems designed for a specific use | – Comes with either set of these labels: A, B, C, and D or 1, 2, 3, and 4. – System has only two wires, but comes with both heating and cooling. |
| Millivolt Heaters | Usually wall or floor heaters and run on the power of electricity or natural gas. Additionally, they utilise quite less electricity than the low voltage systems. | – You can find large wall or floor heaters. – Thermostat only has a red and a white wire. |
| Solid Fuel Systems | Uses biomass materials, coal, wood chips, pellets, or anthracite to produce energy | – Identify if the furnace/boiler is powered by biomass materials |