▶ Watch my full Meross MTS215 Smart Thermostat review on YouTube
If you’re looking for a smart thermostat for electric underfloor heating, the Meross MTS215 Smart Thermostat is currently the only Matter-compatible option available. I reviewed the earlier MTS200 at the start of the year, and this updated MTS215 adds Matter support and a slight redesign, while keeping the same excellent price point of around £50. If you already have an MTS200, there’s no need to upgrade.
Design
The Meross MTS215 features a modern, rounded design and an updated LED touchscreen display that’s brighter and more responsive for manual controls. While the rounded edges look nicer, they may appear slightly off if mounted on a standard backbox. Overall, the design is sleek, minimal, and functional.
Specifications
- Compatible with electric underfloor heating only (boiler version also available)
- Matter compatible over Wi-Fi — works with Apple Home, Alexa, Google Home, and SmartThings without requiring a hub
- Optional external sensor for accurate temperature readings in bathrooms or other separate rooms
- 2.4GHz Wi-Fi connectivity (works even if 5GHz is enabled)
Installation
Professional installation is recommended if you’re unfamiliar with wiring, but I installed mine myself while upgrading from an MTS200. Key points:
- The redesigned back and cable positions may require additional space in your backbox; I used a spacing plate.
- Cables are clearly labelled on both the old and new thermostats, and installation instructions include helpful stickers.
- Ensure power is off before beginning installation.
- The front panel clicks off and on easily for installation and access.
Pairing
Pairing the MTS215 is simple via the Meross app. You can also use Apple Home, though the Meross app provides advanced controls. The process includes scanning the Matter QR code on the thermostat and instruction manual, and the device is automatically added to Apple Home if using an iOS device.
Usage and Features
You’ll likely use a combination of the Meross app and Apple Home app for full control:
- Meross app: View current temperature, humidity, toggle heating on/off, and switch between schedule or manual modes. Adjust temperature via slider, configure notifications, child lock, display brightness, hold actions, calibration, open window detection, frost detection, and external sensor options.
- Apple Home app: Exposes three devices — temperature sensor, humidity sensor, and thermostat. Allows automations with presence detection to solve the lack of geofencing in the Meross app.
Schedules can be set for specific days and times. While the Meross app scheduler is visual, it doesn’t support geofencing. Using Apple Home, I’ve created automations for morning, daytime, evening, and night, which only run when someone is home, saving energy.
Verdict
The Meross MTS215 Smart Thermostat is a strong choice for controlling electric underfloor heating. It has a modern design, a responsive touchscreen, and an optional external sensor for accurate readings. The main downside is the lack of geofencing and multi-user support in the Meross app, but this can be managed using Apple Home automations. At £50, it’s excellent value for a Matter-compatible smart thermostat.
Find the Meross MTS215 and compatible accessories via affiliate links on the site.
