Armstrong Fluid Technology introduces a new circulator featuring Design Envelope technology. The new COMPASS circulator helps with easy selection, fast installation and extremely broad performance capabilities for application to a wide variety of installations. The new circulator also helps reduce energy consumption and operating costs. In auto mode (one of eight operating modes available for selection), the circulator adjusts operating speed to match HVAC demand at any given moment. Over time, the circulator also learns a system’s patterns of demand and appropriately adjusts output to further reduce energy usage.