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How to buy a tankless water heater

In these energy-conscious times, cuts in the use of air conditioning or Water Saving are common ways to protect the environment and also your bank account. But there are many other ways to save energy . A typical example: the tankless instantaneous water heater.

Instantaneous water heaters (or instantaneous water heaters) heat water as needed instead of heating a tank full of water, as is the case with conventional water heaters. The fact that they do not run constantly saves a lot of energy. According to the US Department of Energy, tankless water heaters can be 8 to 34 percent more energy efficient than water heaters with a storage tank.

Sounds pretty good, right? Here are some things to keep in mind when buying a tankless kettle for your home.

Continuous hot water, lower water pressure

When you turn on the hot water tap, electric or gas heaters heat the water as it flows in your path. This gives you an unlimited supply of hot water for your shower, but at a price.

The water pressure will be much lower than when using a hot water tank, as the heating elements take some time to heat a certain amount of water. They produce a flow rate of about 7.6 to 1

8.9 liters of hot water per minute, but some can reach up to 11 gallons (42 liters) per minute.

If you are worried about your morning shower, do not be. Most showerheads are 2.5 gallons per minute high. Your washing machine may fill up more slowly.

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Considerations for Large Households

While your tankless water heater can provide endless hot water for a tap, it also can not deliver hot water to the washing machine, sinks, and other showers at one time , If you usually use several faucets with hot water, you should install two or more waterless water heater to keep up with demand.

In fact, the US Department of Energy says homes that install a water heater on each hot water outlet can save more energy when their family uses more than about 86 gallons of hot water per day.

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Tankless water heaters take up much less space and deliver water on demand.


Gas vs. Electrics

You can either purchase a gas or electric heated tankless unit. There are some benefits for everyone. For example, tankless water heaters usually require larger gas lines than conventional water heaters. This will typically make the installation more expensive than electric.

Gastanklose water heaters, however, can heat water faster, which can provide a higher water pressure. On the other hand, the indicator light is always on, even if you do not need hot water. This can cause them to consume more energy than electrical units.

If you really want a gas unit but want to waste as little as possible, look for those with intermittent ignition (IID). That way, you can easily turn the light on and off when you need hot water.


To find out what size of tankless water heater you need, you'll need a little research. First add the flow rate. This is the gallons per minute of hot water that you will use at any time. These include washing machines, dishwashers, showers, sinks and sinks that you operate at the same time. A Google search of your devices and shower heads gives you a good idea of ​​the flow rate.

Adding them all results in the flow rate that your new tankless instantaneous water heater needs to produce. Write this number before you buy. If you can not find a waterless instantaneous water heater that meets your required flow rate, then you know for sure that your home needs several units.

Another number you need is the temperature increase. This is the amount by which the temperature of the tap water rises before it comes out of the faucet due to the tankless heater.

I will not get you to take the temperature of your cold tap water to find out. Most homes require a unit that can produce a temperature increase of 21 degrees Celsius (70 degrees Fahrenheit). This temperature rise is normally possible at a flow rate of 5 gallons per minute when the unit is gas and 2 gallons per minute at electrical units.

Do you have a conventional water heater? Here is how to light a gas water heater

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