ERP is a modern, variable regulator that precisely adapts energy use to the current demand. Intended for single-phase or 2-phase electrical heaters. The regulator is connected in series between the mains and an electrical heater. The current is electronically switched by a triac without any moving parts. Therefore, the ERP is silent and maintenance free. ERP makes the temperature of the heaters even, for maximum comfort. The current is switched at zero phase angle, to eliminate network disturbance. ERP has a built-in temperature sensor, but external sensors (extra) can be connected and be mounted in a room or incoming air channel. Functions ERP: Comfort temperature, economy saving via external time switch.