... calculated by scientists, the product save power 20-50% than storage-type electric water heaters, energy utilization rate reach more than 95%.2. Water-savingnormal ... 50L-100L, Rapid Water Heater heat up very quickly, no pipeline water loss, every time water loss is almost equal to 0 .3. Save time ... to install, suitable for all kinds of renovated homes. instant electric water heater faucets