# Meross thermostats and radiator valve

*Meross / 6 models*

> Meross thermostats use Matter: the MTS300MA for heating and cooling systems with a C wire, the MTS215MA for electric heating and the MTS215BMA for boilers. The MTS215MA is sold as a US model for line-voltage baseboard heaters and an EU model for electric underfloor heating. The MTS155 is a radiator valve that uses Matter over Thread. The MCA100 adds a C wire for thermostats that need one.

- Canonical page: https://smarthomecanon.com/lines/meross-thermostats-and-valves
- Last checked: 2026-10-16

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Meross](https://smarthomecanon.com/brands/meross) |
| Models | 6 |
| Current | 6 |

## Currently sold

**Meross thermostats and radiator valve: models on sale now**

| Model | Series | Released |
| --- | --- | --- |
| [Meross MTS300MA Matter Smart Thermostat](https://smarthomecanon.com/devices/meross-mts300) | Meross MTS300MA Matter Smart Thermostat | unknown |
| [Meross MTS215MA Matter Smart Thermostat for Electric Heating (US)](https://smarthomecanon.com/devices/meross-mts215ma-us) | Meross MTS215MA Matter Smart Thermostat for Electric Heating (US) | unknown |
| [Meross MTS215MA Matter Smart Thermostat for Electric Underfloor Heating (EU)](https://smarthomecanon.com/devices/meross-mts215ma-eu) | Meross MTS215MA Matter Smart Thermostat for Electric Underfloor Heating (EU) | unknown |
| [Meross MTS215BMA Matter Smart Thermostat for Boiler and Water Heating (EU)](https://smarthomecanon.com/devices/meross-mts215bma) | Meross MTS215BMA Matter Smart Thermostat for Boiler and Water Heating (EU) | unknown |
| [Meross MTS155 Thread Smart Thermostat Valve (EU)](https://smarthomecanon.com/devices/meross-mts155) | Meross MTS155 Thread Smart Thermostat Valve (EU) | unknown |
| [Meross MCA100 C Wire Adapter](https://smarthomecanon.com/lines/meross-thermostats-and-valves#meross-mca100) | Meross MCA100 C Wire Adapter | unknown |

## Lineup

**Meross thermostats and radiator valve: every model**

| Model | Model numbers | Type | Heating system | Standard | HomeKit | Sold in | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| [Meross MTS300MA Matter Smart Thermostat](https://smarthomecanon.com/devices/meross-mts300) | MTS300MA, MTS300 | Wall thermostat[^1] | Heating and cooling, C wire required[^1] | Matter over Wi-Fi[^1] | Via Matter[^1] | US[^1] | Current[^1] |
| [Meross MTS215MA Matter Smart Thermostat for Electric Heating (US)](https://smarthomecanon.com/devices/meross-mts215ma-us) | MTS215MA-US | Wall thermostat[^2] | Line-voltage electric heating, 120 to 240 V[^2] | Matter over Wi-Fi[^2] | Via Matter[^2] | US[^2] | Current[^2] |
| [Meross MTS215MA Matter Smart Thermostat for Electric Underfloor Heating (EU)](https://smarthomecanon.com/devices/meross-mts215ma-eu) | MTS215MA-EU | Wall thermostat[^3] | Electric underfloor heating, 230 V, 16 A[^3] | Matter over Wi-Fi[^3] | Via Matter[^3] | EU[^3] | Current[^3] |
| [Meross MTS215BMA Matter Smart Thermostat for Boiler and Water Heating (EU)](https://smarthomecanon.com/devices/meross-mts215bma) | MTS215BMA | Wall thermostat[^4] | Boiler and water underfloor heating, 230 V[^4] | Matter over Wi-Fi[^4] | Via Matter[^4] | EU[^4] | Current[^4] |
| [Meross MTS155 Thread Smart Thermostat Valve (EU)](https://smarthomecanon.com/devices/meross-mts155) | MTS155, MTS155MAT, MTS155MATTRI | Radiator valve[^5] | Radiator valves, M30 x 1.5 mm[^5] | Matter over Thread[^5] | Via Matter[^5] | EU[^5] | Current[^5] |
| [Meross MCA100 C Wire Adapter](https://smarthomecanon.com/lines/meross-thermostats-and-valves#meross-mca100) | MCA100, MCA100-US | C wire adapter[^6] | Thermostats without a C wire[^6] | Not applicable[^6] | unknown | US[^6] | Current[^6] |

## Related pages

- [Meross](https://smarthomecanon.com/brands/meross) (brand)
- [Meross MTS300MA Matter Smart Thermostat](https://smarthomecanon.com/devices/meross-mts300) (device)
- [Meross MTS215MA Matter Smart Thermostat for Electric Heating (US)](https://smarthomecanon.com/devices/meross-mts215ma-us) (device)
- [Meross MTS215MA Matter Smart Thermostat for Electric Underfloor Heating (EU)](https://smarthomecanon.com/devices/meross-mts215ma-eu) (device)
- [Meross MTS215BMA Matter Smart Thermostat for Boiler and Water Heating (EU)](https://smarthomecanon.com/devices/meross-mts215bma) (device)
- [Meross MTS155 Thread Smart Thermostat Valve (EU)](https://smarthomecanon.com/devices/meross-mts155) (device)

## Sources

[^1]: Meross Matter Smart Thermostat for Cooling and Heating System, MTS300MA - Meross Official Store. https://shop.meross.com/products/matter-smart-thermostat-mts300ma (manufacturer, checked 2026-10-16)
[^2]: Meross Matter Smart Thermostat for Electric Heating System, MTS215MA - Meross Official Store. https://shop.meross.com/products/meross-matter-thermostat-mts215maus (manufacturer, checked 2026-10-16)
[^3]: Meross Matter Smart Thermostat for Electric Underfloor Heating System, MTS215MA - Meross Official Store. https://shop.meross.com/products/meross-smart-thermostat-mts215ma (manufacturer, checked 2026-10-16)
[^4]: Meross Matter Smart Thermostat for Boiler/Water Heating System, MTS215BMA - Meross Official Store. https://shop.meross.com/products/meross-smart-thermostat-mts215bma (manufacturer, checked 2026-10-16)
[^5]: Meross Thread Smart Thermostat Valve, MTS155 - Meross Official Store. https://shop.meross.com/products/thread-thermostat-mts155 (manufacturer, checked 2026-10-16)
[^6]: Meross C Wire Adapter, MCA100 - Meross Official Store. https://shop.meross.com/products/cwire-adapter-mca100 (manufacturer, checked 2026-10-16)