Design Envelope Tango is a compact solution that combines built-in parallel pumping with leading performance and reduced installation costs. Because the two rotating devices share a single casing, installation requires less piping. In addition, the Vertical In-Line orientation means the pump is installed in the piping and does not require an inertia base.

Design Envelope technology includes patented Parallel Sensorless operation, increases flow turn-down and provides built-in flow metering for superior flow control. The energy-efficient design of the Tango reduces operating costs by up to 80% and lifecycle costs by up to 40%. As Tango provides an effective alternative to full duty standby, it can also reduce embodied carbon.

The value of Design Envelope pumps is augmented by Pump Manager, a cloud-based service that provides smart analytics, diagnostics, and alerts to support HVAC system efficiency. All Armstrong 360 Service and Support programs optimise the lifetime performance of HVAC systems.