Armstrong Fluid Technology has announced its Design Envelope pumps now are available with single-phase motors, suitable for light commercial, industrial and residential applications. The pumps offer sensorless variable-speed control, pump and controller integration, and vertical in-line design. They are compliant with ASHRAE’s 90.1 energy-efficiency guidelines. Single-phase motors are available on IVS102 and Design Envelope pumps up to 7.5 horsepower.