3. Estimate the energy savings associated with using a VDF

The power consumed by fans and pumps varies in proportion to the cube of the speed, which means that even small changes in speed can have a significant impact on the power consumed by the load.

The table below shows the power consumption of a fan or pump as the speed decreases.

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Estimate the energy savings associated with using a VDF

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Reference standards

CEE IND-UT-136/ CEE BAT-TH-112: This fact sheet outlines the eligibility requirements and benefits associated with the installation of advanced motorization systems. Industrial companies and building managers may be eligible for financial assistance under the Energy Savings Certificates program. The content of the CEE fact sheets is available at

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