Design Envelope pump vs. a variable speed drive on the wall - white paper
This attached white paper will detail why you are better off REPLACING your constant speed circulator with an Armstrong Design Envelope one, rather than simply adding a wall mounted VFD drive.
See below attached for: Design Envelope pump vs. a variable speed drive on the wall - white paper
A brief summary:
This paper details a factory test rig simulation comparing an Armstrong Desing Envelope (DE) pump with a traditional pump and wall-mounted Variable Frequency Drive (VFD) to a traditional pump in an energy upgrade refit.
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