EVOLUTION 2 A fully titanium heater by Elecro, the Evolution 2, is the latest and upgraded version of the original Evolution. Boasting 100% efficiency, safety, and above all, reliability, this compact and robust unit will effortlessly heat your pool or spa to your desired temperature. Features & Benefitss Ten power options ranging from 1-kW to 24-kW Easy installation, fully equipped and pre-wired Robust, durable construction Ultra-reliable flow switch allows safe operation Temperature thermostat and overheating sensor Compact, durable design Analogue control with 1.2˚C differential or digital control with 0.5˚C differential and selectable multi-lingual display Titanium flow tube and titanium heating element Can be floor or vertically wall mounted Vortex, long life, stay clean heating element technology 100% efficiency throughout the product life Silent operation