How to determine the required size of a tankless hot water heater.
Calculate size of tankless water heater.
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While traditional tank water heaters are calculated by your family size a tankless water heater is calculated by the quantity and types of fixtures or appliances it will serve.
Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.
Flow rate and temperature rise.
Tankless water heater sizing calculator.
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Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings.
Whereas with tankless water heaters it s more important to know how many fixtures it s required to serve simultaneously.
Sizing tankless or demand type water heaters tankless or demand type water heaters are rated by the maximum temperature rise possible at a given flow rate.
The resulting figure is called gpm gallons per minute or sometimes flow rate which helps determine your hot water heater size.
Choose the right tankless electric water heater for you.
Measure your cold water temperature.
With traditional storage water heaters you could calculate the size of it based on the number of family members.
I live in boston so my groundwater temperature is around 47 f.
Tankless water heater sizing calculator.
Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a.
Determine the combined flow rate in gpm.
Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.
Tankless water heater sizing calculator.
Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.
What size tankless water heater depends on your gpm at peak hot water demand.
Determine the mounting space.
Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.
As an example i will show you what came out for me.
Just follow the three simple steps below to choose the right model and size you need.
Simply locate the appropriate water heater sizes on ecomfort using your information.
And your temperature rise which is determined by your incoming water temperature subtracted from your hot water setting.
Looking to purchase a new tankless water heater but having trouble figuring out what size or model you need.
Determine your water flow rates.
