Will it work with your system?
Works well with
- Phone control and scheduling
- Systems the maker's checker confirms
Check first if you have
- Line-voltage baseboard heat
- Millivolt gas heaters
What it controls
The meross MTS300 Smart Thermostat is a smart Wi-Fi thermostat. Its listing doesn't spell out which heating and cooling systems it supports, so run the maker's compatibility checker before you buy.
Power is where installs stall: it needs steady power and the maker includes a C-wire adapter; its wording is "Some wiring configurations require a C wire (not included)". C-wire options.
The listing doesn't state heat pump support; if you have an O/B wire, confirm with the maker before ordering. Heat pump wiring.
Connectivity: Wi-Fi. It amazon Alexa, Android, Apple HomeKit, Google Assistant, SmartThings.
Tick your terminals in the wiring checker to see whether its maker's statements cover your system.
Also on the listing: dimensions of 0.9 in (D) x 3.6 in (W) x 3.6 in (H) and a led.
Warranty, per the listing: 3 year.
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 number | MTS300 | Retailer |
|---|---|---|
| Model name | MTS300 | Retailer |
| Dimensions (seller) | 0.9"D x 3.6"W x 3.6"H | Retailer |
| Works with | Amazon Alexa, Android, Apple HomeKit, Google Assistant, SmartThings | Retailer |
| Features (seller) | Lockable, Low Voltage, Portable, Programmable, Temperature Display | Retailer |
| Connectivity | Wi-Fi | Retailer |
| Power | Corded Electric | Retailer |
| Voltage | 24 V | Retailer |
| Display | LED | Retailer |
| Mounting / installation | Wall Mount | Retailer |
| Warranty | 3 year. | Retailer |
| C-wire | Some wiring configurations require a C wire (not included) | Retailer |
Strong points and weak points
Strong points
- C-wire adapter included
- Works with Amazon Alexa, Android, Apple H
Weak points
- Needs Wi-Fi for smart features
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
Does the meross MTS300 Smart Thermostat need a C wire?
Does the meross MTS300 Smart Thermostat work with a heat pump?
Other smart thermostats with similar wiring
Our take
A fit for phone control and scheduling.
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.
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