Designed for use in potable water systems, the new stainless steel Compass R circulator from Armstrong Fluid Technology features a dry rotor design, as well as advanced variable-speed Design Envelope technology, Armstrong iECMTM motors, and quadratic control to minimize both energy costs and long-term operating costs for homeowners. The quadratic control algorithm offers operating efficiencies that are better than standard variable-speed solutions, and even greater system energy savings are possible with the 0-1 volt DC input signal connection to external systems. The circulator is a bolt-to-bolt match for many installed circulators. 800-356-9845; www.armstrongfluidtechnology.com.