The Meross MTS300MA is a Matter wall thermostat for common North American 24V heating and cooling systems. Apple Home, Alexa, Google Assistant, and SmartThings are listed via Matter. Input is 24V~ on 2.4 GHz Wi-Fi.

A C wire is required; homes without one need the separate Meross MCA100 adapter. Meross recommends the thermostat for North America only, not the EU market. The HVAC should pass Meross’s compatibility checker first.

Pros
– The MTS300MA is a Matter wall thermostat for common North American 24V heating and cooling systems, with Apple Home, Alexa, Google Assistant, and SmartThings
– A C wire or the separate Meross MCA100 adapter can power it

Cons
– A C wire is required; homes without one need the separate adapter
– Meross recommends it for North America only, not the EU market, and the HVAC should pass Meross’s compatibility checker first

Meross Matter Thermostat MTS300MA

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Where to buy (prices as of 2026-08-22)

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