... waste, no limit 3.Durable Electric water heater/Instant water heater/water heater details:1.Key Features:1) ... Safe, convenient, energy saving, environmentally friendly tankless water heater.2) Patent advanced heating technology.3) On ... its service life.9) Less prone to hard water, sediment, or mineral problems.2.Specifications:Rated ... Qty/40' HQ: 2,800pcs Economy-type electric water heater (DSK-G) red