Smart line-voltage ยท meross

meross MTS200 Smart Line-Voltage Thermostat

Smart line-voltage, 120 V, 1,920 W

At a glance

Suited to app control of baseboard heat.

Strong points
Rated 1,920 W.
Weak points
Household-voltage wiring.
Best match
App control of baseboard heat.
Connectivity
Wi-Fi
Schedule
Programmable
Display
LCD
Power
Corded Electric
Voltage
120 V
Max load
1920W at 120V
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Updated October 2026

Will it work with your system?

Works well with

  • App control of baseboard heat
  • Room-by-room electric heat

Check first if you have

  • Furnaces, boilers and heat pumps (24 V)
  • Loads above its rating

What it controls

The meross MTS200 Smart Line-Voltage Thermostat is a smart line-voltage for electric heat that runs at line voltage (120 V per the maker).

Its maker rates it for 1,920 W. At 120 V that covers heaters totalling about 1,920 watts (watts = amps × volts). Check your heaters' load.

Connectivity: Wi-Fi, so the schedule and setpoint can be changed from a phone.

This isn't a 24-volt job. Turn the breaker off, check with a tester, and hire an electrician for anything you're unsure of. Why baseboard heat needs its own thermostat.

Also on the listing: dimensions of 0.9 in (D) x 3 in (W) x 4.6 in (H), a weight of 7.4 ounces and a lcd.

Compatibility and specs

These come from the maker's listing for this exact model; the source of each is marked. Anything the maker leaves out is marked not stated.

Model numberMTS200Retailer
Model nameSmart ThermostatRetailer
Dimensions (seller)0.9"D x 3"W x 4.6"HRetailer
Works withAmazon Alexa, Apple HomeKit, Google Assistant, SmartThingsRetailer
Features (seller)ProgrammableRetailer
ConnectivityWi-FiRetailer
PowerCorded ElectricRetailer
Voltage120 VRetailer
DisplayLCDRetailer
Mounting / installationWall MountRetailer
MaterialAcrylonitrile Butadiene Styrene (ABS)Retailer
Product weight7.4 ouncesRetailer
Works with systemscompatible with the Electric Baseboard, Convector, Fan-Forced Heater and In-Ceiling RadiantRetailer
ScheduleProgrammableRetailer
Max load1920W at 120VRetailer

Strong points and weak points

Strong points

  • Rated 1,920 W
  • Wi-Fi control
  • 120 V

Weak points

  • Household-voltage wiring
  • One thermostat per heater circuit

Wiring and install notes

  • Compatibility statements are the maker's own. Confirm with the maker's compatibility checker, turn the power off before wiring, and leave line-voltage and furnace work to a licensed electrician or HVAC technician.

Thermostats to compare it with

FAQ

How many heaters can the meross MTS200 Smart Line-Voltage Thermostat control?
As many as fit within its rating of 1,920 W: add the heaters' watts and divide by the voltage.
Can the meross MTS200 Smart Line-Voltage Thermostat run a furnace or heat pump?
No. It's a line-voltage thermostat for electric resistance heat; central systems use 24-volt thermostats.

Other line-voltage thermostats with similar wiring

All line-voltage thermostats in one grid

Our take

Suited to app control of baseboard heat.

Where to get it

The link goes to this exact model's listing. Check that the box includes the trim plate or C-wire adapter you need, and confirm your wiring with the maker's compatibility checker before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure