Choosing the Right model for You
Offered in 110 or 208/220/240 Volt options, the American Heat Tankless Electric Water Heater can be used in a variety of applications.
Our space saving design, offers all the benefits of tankless water heaters, from energy savings to endless hot water. To find the unit best suited for your needs remember that there are several factors essential to your proper selection and satisfaction:
1 - Incoming Water Temperature
This can be determined by contacting your local utility department, or applying a mercury thermometer to your cold water tap as the water flows. Temperature should be based on a worse case winter scenario. There will be differences in usage options in the Winter and the Summer months. Summertime will accommodate more simultaneous applications than Winter time.
For your reference of water temperatures please see the following representative map below: (Please note: Actual water temperatures may vary depending on the depth of installation of your water service to your home or business)
2 - Maximum flow rate desired
Refer to the tables referencing common flow rates from common fixtures, add together the flow rates from the different fixtures intended for use at the same time, the most appropriate measure will always be to look up the specifications of the fixtures installed in your home.
Generally, a maximum flow rate of 3 GPM will be sufficient for all applications.
3 - Available electrical capacity
Refer to the product specifications to make sure your home or business can accommodate the electrical load required.
NOW SELECT YOUR MODEL – Knowing your incoming water temperature and how much water you need to heat at precisely the same time you can select the appropriate model from the table below. (Please note our Tankless water heaters provide an endless supply of hot water but only at the outputs shown below.) The chart below shows the flow provided by our models at different input temperatures. All models work with a 208/220/240 application. The following table is based on a 240V application:
Using the chart above: If you typically use about 2.5 GPM at once, then find that number or the nearest number on the chart. If the number is highlighted GREEN, that means it’s a great model for you. If it’s highlighted in YELLOW, that means you can get by with it. If its highlighted in ORANGE it can serve as a point of use application. If its highlighted in RED, you should consider a model a step or two up.
