The Duo Smart Heater electric storage heater is an electric radiator with a heat storage tank made of special fireclay storage bricks. Compared to other electric storage heaters, e.g. partial storage heaters or surface storage heaters, it has the largest storage volume and stores the most heat over the longest period of time.

The heating elements are located between the premium storage stones. They heat the fireclay bricks in the well-insulated storage core. The electric heater emits hardly any heat via the surface during charging. When heating is required, you control the targeted heat output via a thermostat on the electric heater.