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Electric Tankless Water Heater Model Selector

Choosing which model of electric tankless water heater best suits your needs can be a daunting task to those new to tankless water heaters. Fortunately, since our site targets predominantly Canadian customers it makes it much easier to narrow down the choices. There are four factors that go into sizing a tankless water heater appropriately:

Flow rates with green backgrounds indicate they are recommended for whole house use. Best model choices for general whole-house water heating demands in moderate to large homes. Areas indicating a maximum flow rate of 4.0 gallons per minute or more are generally appropriate for running 2 showers at a time with standard showerheads.
Flow rates with white backgrounds indicate whole house use is appropriate, but flow rate measurements are recommended. Blocks with a white background are suitable for homes with modest hot water needs and that use newer low-flow showerheads. If you are considering one of these units, careful measurement of your actual water flow rate and incoming water temperature are recommended before making a final model selection.
Flow rates with red backgrounds indicate only small point of use applications are appropriate. Only suitable for small point-of-use applications in Canada.
Maximum Flow Rates at 105°F Output Water Temperature
Incoming Water Temp: 40F 45F 50F 55F 60F 65F 70F 75F 80F
Tempra 36 Plus

3.8 GPM 4.1 GPM 4.5 GPM 4.9 GPM 5.4 GPM 6.1 GPM 7.0 GPM 8.2 GPM 9.8 GPM
Tempra 29 Plus

3.0 GPM 3.3 GPM 3.6 GPM 3.9 GPM 4.4 GPM 4.9 GPM 5.6 GPM 6.5 GPM 7.8 GPM
Tempra 24
Tempra 24 Plus
2.5 GPM 2.7 GPM 3.0 GPM 3.3 GPM 3.6 GPM 4.1 GPM 4.7 GPM 5.4 GPM 6.5 GPM
Tempra 20
Tempra 20 Plus
2.0 GPM 2.2 GPM 2.4 GPM 2.6 GPM 2.9 GPM 3.3 GPM 3.7 GPM 4.4 GPM 5.2 GPM
Tempra 15
Tempra 15 Plus
1.5 GPM 1.6 GPM 1.8 GPM 2.0 GPM 2.2 GPM 2.4 GPM 2.8 GPM 3.3 GPM 3.9 GPM
Tempra 12
Tempra 12 Plus
1.3 GPM 1.4 GPM 1.5 GPM 1.6 GPM 1.8 GPM 2.0 GPM 2.3 GPM 2.7 GPM 3.3 GPM