Outdoor Temperature Reset saves energy with modern condensing boilers as well as older non-condensing models. For a worry free installation, look at controls that include both Outdoor Temperature Reset as well as Indoor Temperature Feedback. By combining these two features, the system provides maximum energy savings and comfort.
Outdoor Temperature Reset with Indoor Temperature Feedback ensures modern high efficiency condensing boilers are operated using the lowest possible water temperatures. This is important because the efficiency of these boilers increases with lower return water temperatures.
The chart on the left illustrates how the efficiency level of a condensing boiler decreases as the return water temperature increases. The performance advantage of these boilers can be lost if they are not given the chance to operate at lower temperatures.