Also known as demand-type or instantaneous water heaters, tankless water heaters are similar to conventional water heaters in that they use gas, electric resistive, or heat pump technology to heat ...
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New Homeowner’s Guide to Water Heaters
As the name suggests, a water heater turns cold water into hot water so you can shower, wash the dishes and do the laundry. Modern water heaters do this much more efficiently than their predecessors.
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