Digital Mixing Savings Calculator

Save by upgrading your Thermostatic Mixing Valve (TMV) to an equivalent Digital Mixing Valve (DMV)

How does the calculator work?

  • The Digital Mixing Savings Calculator estimates the difference in energy cost (in energy units and dollars) required to heat water to desired settings. The tool calculates the difference in cost requirements between the IntelliStation and an equivalent TMV.
  • The tool calculates the energy required to raise recirculation water temperature from the lowest end of the temperature control range to the outlet and water heater temperatures.

Temperature control range:

- IntelliStation = ±1°C
- TMV = User-defined input (±1°C to ±4°C)

  • The calculator provides a high-level estimate of savings gained by better temperature control and lower circulated temperature during non-use hours. Greater savings can be calculated using the broader calculation tool that allows for separate water heater/outlet temperature settings for the DMV/TMV valve types.

jQuery UI Slider - Custom handle
Select your heat source, energy cost, and temperature settings
You can add a custom rate for your location.
Use units that match the energy type of the selected heat source: therm, kWh or btu
Price: ($)
Flow Rate

Allowable Temperature Fluctuation
20-150 LPM ±3°C
Over 150 LPM ±4°C
  TMV temperature control variation +/-°C
1.0 1.5 2.0 2.5 3.0 3.5
The Water Heater Tank Temperature should be a minimum of 5 degrees higher than the Outlet Temperature. This value + setback hours are used to calculate total savings.
Outlet temp. Water heater tank temp.
50 55 60 65 70 75

Return Temperature

Select your TMV system and preferred setback settings
Equivalent DMV system:

IntelliStation Jr.
Setback = 60°C Outlet Temp – 10°C.
Setback = 50°C for 14 hrs on Saturday
and 14 hrs on Sunday

Save with Setback Hours
Select normal hours of operation per day
Setback - Temperature reduced by:

Get results
Savings Summary
  TMV vs DMV
+/-2°C Temp Control

Total Savings
Monthly Savings: 0
Annual Savings: 0

Do you like the savings?

NOTE: The results generated by this calculator are estimates only based on the information provided and selected by you. Watts does not guarantee that you will achieve the exact savings generated by this tool, as conditions at each property, including energy consumption and cost, can vary.

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.