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design envelopecompass h circulators


Residential heating and cooling; potable water supply


The Armstrong Compass H is an energy-efficient variable speed wet-rotor circulator. Designed to replace existing fixed speed circulators, with popular flange-to-flange dimensions, Compass H can be considered a universal replacement for all circulators in its capacity range.


Cast iron and stainless steel volutes.


Eight operation modes with patented “Auto” algorithm, four Sensorless modes and three fixed speed modes. 50 Hz and 60 Hz designs

Performance range

Up to 20 USgpm (1.26 L/s) flow; up to 20 ft (6.1 m) head


Max ambient temp. 40°C; max water temp. 110°C

Power Range

5 W to 45 W



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