Lots of people love the idea of having an instant hot water dispenser in their kitchen. Using instant hot water allows you to make hot cereal in the blink of an eye, or a cup of tea almost as fast as you can make a cup of instant coffee. And that ready supply of hot water makes clean up a breeze.
How Does an Instant Hot Water Heater Work?
Instant hot water heaters are basically small electric hot water tanks (none of them are gas fired). A small tank holds the hot water ready for use, just waiting for when you turn on the special instant hot water tap at the sink. Water is supplied to the tank through a small water line that runs off the sink's main cold water feed line. It comes into the base of the tank, where it's heated by an electric element. This heating causes the water to expand, and it moves up into a holding tank in the top of the tank where it is kept hot. When you turn on the dedicated tap, hot water flows out the top and fresh cold water flows in at the bottom.
Instant hot water dispensers range in capacity from 1/3 to 1/2 gallon, and the heating elements vary from 500 to 1500 Watts. It's estimated that a 750-watt 1/2-gallon tank can deliver up to 60 cups of hot water in an hour. Since the instant tanks produce water that is substantially hotter than regular hot water tank (about 190 degrees versus 120 degrees), the water is delivered at a much slower rate than a regular hot water tank (about one ounce per second).
Most instant hot water tanks have a thermostat that allows you to adjust the temperature if the water is too cool, or if it's too hot and boils away. You can get instant hot water heaters that are part of "total" water systems as well. Some are produced with integrated water filters or even water chillers to provide pre-chilled drinking water.
Source : www.doityourself.com/stry/hotwatersolutions#ixzz1tpVkwaUf
by Murra Anderson
www.guaranteedplumbingco.com
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