... Grade:1px4 Advantages: A) Save water: Ordinary storage water heater pipe laying a long, and pipe out the cold ... heating mode, no preheating, no heat preservation, no pipe heat loss; However, by using Ordinary storage water ... heater, the pipe heat loss can reach 10% to 15%. C) Save worry: 24 hours a day, no ... the fast pace of life needs. D) Easy installation, no need plumber, just one minutes work. E) ...