Model Name : 5000 Series Models Available : COMFORT LH-5000E COMFORT LH-5000EM* COMFORT LH-5500E* (POWER BOOSTER) TURBOFLOW LH-5000EP* TURBOFLOW LH-5500EP* (POWER BOOSTER) * E- Models come with Built-in Electronic ELCB *EP - Models come with Built-in Electronic ELCB and Shower Pump *EM - Models come with Built-in Electronic ELCB and Multipoint Innovative Features : Electronic Temperature Control Auto Thermal Cut-out-prevents overheating Flow Switch System High Low Water Pressure Splash Proof Anti Leak Tank Built-in Electronic ELCB & Lightning Protector (Optional) Built-in Shower Pump (Optional) Optional : Alpha LH - 5500 EP models come with built-in power booster specifically designed for 50% more power.