VARIABLE FREQUENCY DRIVES (VFDS)
VARIABLE FREQUENCY DRIVES (VFD) Requirements:
• Complete Table J of the “2026 HVAC Rebate Requirements and Supplemental Data Sheet” for this measure. • The individual motors controlled by the VFD must operate a minimum of 2,000 hours annually and may not exceed 500 hp. VFDs controlling motors larger than 500 hp or that run <2,000 hours annually may be eligible for a custom rebate. • VFD speed must be automatically controlled by differential pressure, flow, temperature, or other variable signal. • VFDs added to chillers, kitchen ventilation hoods, and air compressors do not qualify for this rebate. Refer to “Cooling Systems” section of this catalog if installing a chiller with a VFD, Process Systems Rebate Catalog if installing a Variable Speed Drive air compressor, or apply for a custom rebate if installing a VFD somewhere else. For constant torque and variable torque VFD rebates for industrial and process uses, see the Variable Frequency Drive section of the Process Systems Rebate Catalog. • VFD must be installed on a centrifugal or axial flow pump or fan, i.e., a variable torque load. • Staged air volume systems (using a VFD to achieve two-speed fan control on a rooftop unit) and units installed only to allow soft starts, are not eligible. • The system controlled must have significant load diversity that will result in savings through motor speed variation.
Measure Description
Code
Rebate
Unit
Variable Torque VFD, Boiler Draft Fan Variable Torque VFD, Cooling Tower Fan
H2640* H2641* H2643* H2644* H2646* H2726*
$55 $55 $55 $55 $55 $55
HP HP HP HP HP HP
Variable Torque VFD, HVAC Fan
Variable Torque VFD, HVAC Heating Pump Variable Torque VFD, Pool Pump Motor
Variable Torque VFD, Chilled Water Distribution Pump
*Supplemental data sheet needed.
32
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