Mill WIFI3 Smart Thermostat with Bluetooth, White

Dual-band Wi-Fi and Bluetooth connectivity puts precise temperature control of electric heating systems, panel heaters, oil radiators, and underfloor heating right in your pocket. The Mill WIFI3 Smart Thermostat delivers automation, energy savings, and voice assistant compatibility in a sleek white flush-mounted design.

Overview

Mill's WIFI3 thermostat brings automation and energy savings to your fingertips. With the Millheat app for iOS and Android, you can adjust temperatures, create weekly schedules, and monitor energy use from anywhere. The sleek white flush-mounted design fits standard wall boxes, while the backlit LCD keeps you informed at a glance.

What stands out

• Dual connectivity – Wi-Fi and Bluetooth
• Compatible with Amazon Alexa and Google Assistant
• Predictive heating and open window detection
• Optional external floor sensor support
• Weekly programming and holiday mode
• Over-the-air (OTA) updates for future functionality

Technical details

• Power supply: 230V AC, 50/60Hz
• Maximum load: 16A / 3680W
• Temperature control range: 5–35°C
• Sensor: internal air sensor, optional external floor sensor (NTC 10kΩ)
• Display: LCD with backlight
• Connectivity: Wi-Fi 2.4 GHz, Bluetooth
• Protection class: IP21
• Control: Millheat app and manual buttons

Our verdict

The Mill WIFI3 is a robust and feature-rich smart thermostat that simplifies electric heating control. Its combination of Wi-Fi and Bluetooth, alongside voice assistant support, makes it a versatile choice for modern smart homes.