Upgrade for HVAC fluid-flow efficiency with Armstrong’s expanded line of variable-speed circulators

The Design Envelope Compass R is an energy-efficient variable-speed dry-rotor circulator

August 8, 2025 — Armstrong Fluid Technology has introduced two new sizes, 40-85 and 60-50, of Design Envelope Compass R circulators. The Compass R is an energy-efficient variable-speed dry-rotor circulator. Designed to replace existing fixed-speed circulators, Compass R can be considered a universal energy upgrade for circulators in its capacity range and installation profile. Customers can purchase Compass R circulators to serve applications requiring up to 60 feet of head.

Orange, dark gray and silver Design Envelope Compass R circulator
Design Envelope Compass R variable-speed dry-rotor circulators replace existing fixed-speed circulators. Image courtesy of AFT

Commenting on the release of the two new models, Tanvir Rahman, Offering Manager, Standard Building Products, noted:

The Compass R offers an industry-leading feature set including a fully repairable dry rotor design, easy access for repairs changes and embedded Design Envelope variable speed technology. The new models will make these features available to more customers and a wider range of applications.

The new Compass R features include:

  • Permanent magnet motor with Design Envelope variable speed technology
  • Posi-start Technology ensures smooth start-up and pump protection
  • Bolt-for-bolt compatibility with wide range of installed circulators
  • Quick-release clamp that makes repairs easy
  • Reduced carbon footprint
  • Easy terminal block access
  • Optimized hydraulics with high-efficiency dry rotor design
  • Multiple control options, including Auto mode, simplify selection and commissioning

Learn more about Design Envelope Compass R circulators at Armstrong Fluid Technology.

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