Designed for use in hydronic heating and cooling applications. The temperature of the water is controlled by regulating the speed of the pump which injects water from a different temperature water loop (Primary loop) into a controlled loop (Secondary loop).

As the speed of the pump increases, more water is sent into the Secondary loop, resulting in a secondary loop water temperature change.

The NRF-VS Control is available either installed on a B&G NRF-22 or as a field mountable controller that can be installed onto a B&G wet rotor in the field. The snap-on design allows the NRF-VS to be quickly attached to a standard B&G wet rotor circulator.