Electric heater for pools and spas with a unique and proven spiral element that creates turbulence in the water stream. It provides outstanding efficiency and extended service life as it counteracts mineral deposits on the element. Thanks to 3-phase, the current is distributed over more phases for lower amperes. Adjustable thermostat 0°-45° and flow monitor. Note: This electric heater is a professional unit, which is supplied without a plug on the cord. Installation must be done by an authorized electrician.