4
SIZING GUIDE
To ensure the optimal temperature output and overall
performance of your tankless water heater an aerator
supplied with heater should be installed.
AERATOR SUPPLIED IS .35GPM/1.3LPM
DANGER INCREASING THE FLOW RATE REDUCES THE OUTLET TEMPERATURE.
PLEASE BE SURE TO PROPERLY SIZE YOUR AERATOR TO PREVENT SCALDING
Usage Key
Shower
Flow rate of 1.5 GPM
Faucet
Flow rate of .5 GPM
Inlet Temp: The temperature of cold water before it enters the water heater.
GPM: Gallons Per Minute
Approx. Usage: The number of faucets and/or showers this model will
serve based on a temperature setting of 105°F. Higher temperature
settings will reduce ow rates.
INLET WATER TEMPERATURE
Zone 1 ¢
Zone 2 ¢
Zone 3 ¢
Zone 4 ¢
Use the guide below to help select the right tankless water heater.
1. CONSIDER LOCATION AND SEASONAL CHANGES
Average water supply inlet temperature varies by location. Select the zone below that aligns with installation location.
2. CONFIRM THIS WILL BE ADEQUATE
Based on the zone of the installation location, conrm this product will supply enough hot water.
Inlet Temp.
37-47˚F
Inlet Temp.
47-57˚F
Inlet Temp.
57-62˚F
Inlet Temp.
62-77˚F
Model
Max.
GPM
Approx.
Usage
Max.
GPM
Approx.
Usage
Max.
GPM
Approx.
Usage
Max.
GPM
Approx.
Usage
3.5 kW 0.4
Not
recommended
0.5
Not
recommended
0.6 0.9
6.5 kW 0.7 0.9 1.0 1.5
Zone 1 Zone 2 Zone 3 Zone 4
WATER SUPPLY INLET TEMPERATURE