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White rectangular smart thermostat with touchscreen display

Meross MTS300 smart thermostat

SKU CH-58TT-D5C5P MPN MTS300

Controls 24 V HVAC systems via 2.4 GHz Wi-Fi and Matter with Alexa, Google, HomeKit and SmartThings

  • ColorNatural White
  • Amazon Alexa CompatibilityAmazon Alexa
  • Google Assistant CompatibilityApple HomeKit
  • Apple HomeKit CompatibilityGoogle Assistant
  • Works with 95% of 24V HVAC systems including heat pumps
  • Local Matter integration with Apple Home, Alexa, Google Home and SmartThings
  • Custom 24/7 schedules cut energy use when away
  • Remote monitoring and control via Meross app anywhere
  • Smart alerts track filter life and system malfunctions

Smart thermostat for 24 V HVAC systems

The Meross MTS300 is a smart thermostat designed for 24 V heating and cooling equipment such as heat pumps, furnaces, boilers, air conditioners, humidifiers and dehumidifiers. It supports roughly 95 percent of those systems but does not work with 110 V, 120 V or 240 V electric baseboard heaters, millivolt setups or two-wire installations. A C wire may be required depending on the wiring configuration.

Matter integration over 2.4 GHz Wi-Fi

The thermostat connects to a 2.4 GHz Wi-Fi network and joins Matter-certified platforms locally, including Apple Home, Amazon Alexa, Google Home, Home Assistant and SmartThings. This removes the need for multiple vendor apps and lets the device be controlled alongside other Matter accessories from a single interface. The optional MS130H sensor can be paired for additional room monitoring.

Scheduled operation with alerts

A 24/7 programmable schedule adjusts temperatures automatically for home, away and sleep periods, reducing unnecessary HVAC runtime. The app tracks filter life, flags system malfunctions and reports long-run events so maintenance can be planned before a failure occurs. Adjustable screen brightness keeps the display readable without adding light at night.

Highlights

  • Works with 95% of 24V HVAC systems including heat pumps
  • Local Matter integration with Apple Home, Alexa, Google Home and SmartThings
  • Custom 24/7 schedules cut energy use when away
  • Remote monitoring and control via Meross app anywhere
  • Smart alerts track filter life and system malfunctions

Specifications

BrandMeross
ModelMTS300
ColorNatural White
Amazon Alexa CompatibilityAmazon Alexa
Google Assistant CompatibilityApple HomeKit
Apple HomeKit CompatibilityGoogle Assistant

Questions about this item

Does the 2.4 GHz Wi-Fi connection limit range or stability when the thermostat runs continuously?

The thermostat only supports 2.4 GHz Wi-Fi networks; sustained use does not introduce additional limits beyond standard network coverage.

How much heat or noise does the unit produce during all-day operation?

The thermostat has no fan or moving parts, so it generates negligible heat and runs silently even with continuous use.

What existing wiring must I already have for this thermostat to work?

A 24 V HVAC system is required, and some configurations need a C wire (sold separately); 110 V, 120 V, 240 V baseboard and millivolt systems are not compatible.

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