The Mill Invisible Smart WiFi PA1500WIFI4A is a 1500W Gen 4 panel heater designed for both wall-mounted and portable use. Mill includes a wall bracket and a foot, so the same heater can be installed permanently or positioned on the floor when flexibility is more useful. It is recommended for rooms of 18–22 m² and uses an X-aluminium heating element with silent operation, an LED display and Mill PID Wattage Tech for more controlled heat output.

WiFi, Zigbee 3.0 and the Mill App provide connected control, with Bluetooth 5.2 assisting setup and Matter compatibility for supported smart-home ecosystems. Predictive Heating can work toward scheduled target temperatures, while Open Window Function responds to sudden temperature drops. The heater is IPX4 rated and includes overheat protection plus child and commercial locks. The supplier EAN requires verification because current exact-model listings show a different GTIN.

Flexible 1500W Gen 4 panel heating for wall-mounted or portable use, with WiFi, Zigbee, Matter and PID control.

Ideal For

Key Features

One heater, two placement options

Mill includes both a wall bracket and a foot, allowing PA1500WIFI4A to work as a wall-mounted panel heater or a portable floor-standing unit. That makes it the most flexible placement option among these Gen 4 panel models.

Connected control across multiple platforms

WiFi, Zigbee 3.0 and the Mill App are supported, with Bluetooth 5.2 assisting setup. Matter compatibility enables control through supported smart-home ecosystems.

PID and predictive temperature management

Mill PID Wattage Tech modulates power near the target temperature, while Predictive Heating learns the room’s thermal behaviour to support scheduled comfort. Open Window Function adds an automatic response to sudden temperature drops.

How It Compares

Compared with the wall-mounted PA1300WIFI4, this model increases output to 1500W, is recommended for 18–22 m² and includes a foot as well as a wall bracket for portable use.

The Verdict