“What is hot-water pipe boiler?” It’s using a standard and low-costed XL pipes as a heating element hot-water heater. ◇ Sort of Electric Boiler ► Night-electric boiler: Restricted supply and Low energy efficiency ► Electric heating heater: No electromagnetic wave and radiant heat ► Electric hot-water boiler: Delayed heating at an early Type Heating way Application Pros / Cons Night-electric boiler · open hot-water circulation · Only for heating · Need space to be installed · Low heating efficiency · Low cost with night electricity · Using night electricity · Need assistant heater · Regenerative way · Restricted supply (10 hours in night) Electric-heating heater · Direct heating · Heat partly · Caution of electromagnetic wave and electric safety · New material (electric panel, film heater) · Heat temporary · Low heating efficiency · Applying progressive tax of house Electric hot-water Boiler · Using heating line inside of sealed heating pipes · Able to use except house electricity (Industry, Farming, standard) · High efficiency electric floor heating · 1 line heating wire · No progressive tax · Natural energy floor radiant heating · 2 line heating wire · Ondol (floor heating) · 3-5 line heating wire · Permanent heating · Independent heating without a boiler room · Safe heating without electro magnetic wave · Applying progressive tax of house