Commercial Advanced Rooftop Unit Control (ARC)

Rebate amounts and program requirements are subject to change without notice. All homes or businesses are subject to inspection and usage data analyzed by participating in energy efficiency programs. Any rebates will be applied to past due amounts owed CPI before payment is issued.

Advanced Rooftop Control (ARC) retrofits add a variable frequency drive (VFD) and controls to existing, constant-speed HVAC rooftop unit (RTU) supply fans. Energy savings are predominantly achieved by reducing the operation of the supply fan. For this reason, the measure applies to both electric and gas systems. For the purposes of this measure, there are two types of ARCs, defined as follows:

 ARC Retrofit – Lite
ARC-Lite products add one of the following equipment options to the existing RTU:

  • A VFD and controller for variable speed fan operation; or
  • A multispeed motor and controller for multispeed fan operation.

ARC Retrofit – Full
Full-ARC products add one of the following equipment options to the existing RTU:

  • A VFD and controller for variable speed fan operation; or
  • A multispeed motor and controller for multispeed fan operation.
  • Full-ARC products also add a controller with all of the following enabled:
  • Digital, integrated economizer control with either differential dry-bulb, or differential enthalpy with fixed dry-bulb high-limit shutoff; and
  • Demand Control Ventilation with proportional control, based on CO2 sensor reading.

Qualifications:

Preconditions:

  • All projects must be pre-approved by CPI.
  • RTU heating fuel type may be electric or gas.
  • Existing RTU has the following characteristics:
  • A cooling capacity equal to or greater than five tons;
  • A unitary system (split systems are not eligible); and
  • A constant-speed supply fan (RTUs with variable speed fans are not eligible).

Post-conditions:

Incentive Amount:

ARC-Lite: $100 per ton

ARC-Full: $200 per ton