Armstrong Fluid Technology’s Generation 3 Design Envelope pump line features 33 advanced energy-saving models, ranging in sizes from 1 hp to 75 hp. Armstrong’s Design Envelope technology is built around four core competencies: heat transfer, fluid flow, variable speed, and demand based control. The pumps exceed the ASHRAE 90.1 energy standard for buildings. The pumps also feature TEFC motors as standard to 25 hp, 230/460/575V options and fixed configuration codes for ease of product identification and order entry.