State Water Heater Water Heater Brochure

BASIC SIZING GUIDELINES
The flow rate capacity of tankless water heaters depends
on the temperature difference between the desired output
and incoming water temperature. The flow rate comparison
chart and table shown here summarize the flow rate charts
found in the specifications of each model.
State water heaters are sized according to the peak flow
rate requirements, worst-case temperature-rise scenarios,
and types of applications. Once these factors have been
determined, refer to either the flow rate comparison here or
the flow rate charts found in each model’s specifications.
Select the appropriate water heater as well as the amount
of water heaters required.
MATCH THE UNIT TO YOUR NEEDS
Application designers/engineers can decide whether to
size for full flow, expected flow, or utilize probability
models such as the modified “Hunter Curve.” For
large scale applications such as hotels, apartment
complexes and large restaurants, Hunter Curves are
commonly used to estimate the peak flow rate demand
when given the total amount of fixture units within
an application. It is up to the application designer/
engineer to determine the amount of fixture units
within any given application.
110/ U/C
Non-Condensing Units
Condensing Units
Commercial Units
310 / U/C
240
340
540P
510/ U/C
910
140
2.5 Showers
2.5 Showers
3.5 Showers
3.5 Showers
4.5 Showers
7 Showers
5 Showers
3 Showers
2.5 Showers
2.5 Showers
2.5 Showers
2.5 Showers
1.5 Showers
1.5 Showers
4 Showers
3.5 Showers
(Assuming the set point temperature is 120˚F )
Cooler Climates
50°F Incoming Groundwater Temperature
Warmer Climates
70°F Incoming Groundwater Temperature
Capacity - Number of Shower Heads
CT-199
4.5 Showers
3 Showers
8