How to Select Demand Water Heaters
You won't suffer with a cold shower after installing a demand water heater. The water is heated instantly when you need it with a heating element. These systems, which are also called a tankless water heater or an instantaneous water heater, eliminate the need for large storage tanks. This results in less spaced used by the water heater. There are certain considerations when purchasing a demand water heater. Whether you replace a tank-style water heater or choose a demand water heater for a new construction home, you'll want a system that meets your needs and budget. Does this Spark an idea?
Instructions
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Decide if a demand water heater is right for your needs. While a demand water heater provides instant hot water, it can only supply a certain amount of hot water per minute, usually between two and five gallons. This isn't usually a problem unless you need hot water in more than one place simultaneously.
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Decide the amount of money you want to spend on the tankless water heater. Use this budget to narrow down the options.
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Determine the size of the demand water heater you need. Consider how often you need hot water in more than one location of the home to select the proper flow rate for your demand water heater.
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Calculate the maximum temperature rise of the water you'll need the water heater to produce. Subtract the temperature of the incoming water source from your desired hot water temperature. A common output temperature is 120 degrees. It is safe to assume the incoming water temperature is about 50 degrees. In this case, choose a water heater that can handle a 70 degree temperature rise.
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Select the power type you prefer for the heater. The options include electric, natural gas or propane. Consider the type of fuel you have available in the home. Compare the local costs of each fuel type to determine which option is most affordable for the water heater.
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Evaluate the energy efficiency of the demand water heater possibilities. Compare the energy factor for each tankless water heater model you are considering. The more efficient the unit, the less energy it consumes. This saves you money on your utility bills and benefits the environment.
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