- High performance twin coil heat exchanger
- Unique 'L' shaped immersion heater maximises the volume of hot water available when heated electrically
- Large bore tappings and low resistance safety valves for outstanding high flow rates
- External expansion vessel
- 100mm of CFC / HCFC-free injected foam for optimum heat retention and energy efficiency
- 1 x 3kW heating element as standard on 400, 500 and 570 models
- 1 x 6kW heating element as standard on 800 and 1000 models