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Facts About Home Tankless Water Heaters

 

Tankless hot water heaters are following the trend in new home construction to stay up to date in energy efficiency. Tankless technology is a smart way to improve on one of a home's major appliances. Along with this comes the same benefit when retro fitted to existing homes - less space and more hot water.

Water usage and heating water go hand in hand. You may be using more water than you think. Here are some U.S. averages that are telling:
2 gal -shaving
4 gal - hands and face
20-25 gal - for 15 min shower
12-15 gal to hand-wash dishes
Installed sprinkler control saves 40 gal/day

Water Facts

When setting the temperature of a tankless water, 110-120 degrees F. is adequate for most household needs, you are setting hot water on demand, so there is no need to set water hotter than you use.  Actually 110 degrees is adiquate for showers but dish washers and th e like require a higher temperature.

Water temperature is an essential piece of information when deciding on a tankless water heater. The difference in temperature between water entering the house and at the faucet is something that needs to be factored in, if you are going to determine the capacity of a tankless heater for the home.

This difference, or rise, could be anywhere between 30 degrees in the southern U.S. to 80 degrees F. in the northern part. This is easy to check with a digital thermometer. Also note that temperature can easily vary 30 degrees, or more, by season.

It is the plotting of temperature rise and and gallons per minute that determines the the capacity of the heater you will need.

As an example.
.75 gpm - sink faucet
1-1.5 gpm - water-saver shower
1.5-2.5 gpm - tub faucet

Many manufacturer's sites have charts and tables for making these calculations.

If you would like to know more about this, visit this site for information about residential tankless heaters.



 

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