Tankless Hot Water Heaters
Throw away your water heater tank and shave ten to twenty percent off your water heating bill. That savings results from elimination of standby losses (energy lost from warmed water sitting in a tank). And, since water heating accounts for about 15 percent of the average U.S. household energy budget, this could be a significant loss. Tankless water heaters provide hot water at a preset temperature when needed without storage, thereby reducing or eliminating standby losses. Tankless water heaters can be used for supplementary heat, such as a booster to a solar hot water system, or to meet all hot water needs. Tankless water heaters have an electric, gas, or propane heating device that is activated by the flow of water. Once activated, the heater provides a constant supply of hot water. The maximum flow rate at a desired temperature will be determined by the capacity of the heater. Gas tankless water heaters typically have larger capacities than electric tankless water heaters. Large units intended for whole house water heating are located centrally in the house while, in point-of-use applications, the water heater usually sits in a closet or under a sink
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