2026 HVAC Catalog

VARIABLE FREQUENCY DRIVES (VFDS)

VARIABLE FREQUENCY DRIVE (VFD) Requirements:

• 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 incentive. • 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 Incentive Catalog if installing a Variable Speed Drive air compressor, or apply for a custom incentive if installing a VFD somewhere else. For constant torque and variable torque VFD incentives 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. • Fans and pumps with integral variable speed capabilities, such as ECMs > 1 hp, qualify for VFD rebates. • Replacement of existing variable frequency drive does not qualify. Measure Description Code Rebate Unit Variable Torque VFD, Boiler Draft Fan H2640* $55 hp Variable Torque VFD, Cooling Tower Fan H2641* $55 hp Variable Torque VFD, HVAC Fan H2643* $55 hp Variable Torque VFD, Chilled Water Distribution Pump H2726* $55 hp Variable Torque VFD, HVAC Heating Pump H2644* $55 hp Variable Torque VFD, Pool Pump Motor H2646* $55 hp Variable Torque VFD, Boiler Draft Fan N-H2640* $45 hp Variable Torque VFD, Pool Pump Motor N-H2646* $45 hp *Complete Table H on the Supplemental Data Sheet.