Abstract
Tankless water heaters, also called instantaneous or demand water heaters, have no
storage tank, but instead heat the water as it fl ows past a heating element. Although
the market penetration of tankless water heaters in North America is still relatively
low, this option has been growing in popularity, and manufacturers are projecting
that sales could increase to as much as 30% of the U.S. market by 2010.
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