As seen on empoweringpumps.com - June 16, 2014
Parallel pumping is a common design in HVAC systems. To combine the advantages of parallel pumping with intelligent variable speed technology, Armstrong now offers Design Envelope Parallel Sensorless™ pump control. This new control technology can be added to any Design Envelope Vertical In-Line or dualARM pump, to provide advanced, variable flow, parallel pumping.