Advanced RTU Control Retrofit - Utilities, Efficiency Programs

This toolkit includes resources to assist utilities and efficiency programs in understanding and incentivizing advanced RTU control retrofits. Reference guidance on various considerations including a decision tree on when to retrofit units, RTU inventory and evaluation checklists, procurement specifications, case studies, and M&V methods.

  • TOOLS
    This decision tree guides to reader through the challenging task of determining how to manage existing rooftop units with easy to follow evaluation questions and links to additional resources for more information.

    Use the RTU Inventory Spreadsheet to gather basic information (i.e., number, size, age, general condition, etc.) 

    This specification lists potential important features and best applications for advanced rooftop unit controllers.

    Various M&V methods are helpful in estimating the payback and justifying future projects and understanding water efficiencies, emissions reductions, maintenance costs and savings, indoor environmental quality (IEQ) improvements, and occupant satisfaction.

    In order to streamline efforts for eliminating inefficiencies, JC Penney pursued a pilot program for RTU variable frequency drive (VFD) technology. Following the successful pilot program, JC Penney retrofitted 1,330 rooftop units in 130 additional stores with the VFD retrofit solution. The company recognized savings of as much as 47,800,000 kWh, a 22% reduction from before the VFD retrofit and a monetary savings of as much as $5 million.



Tool type:

Toolkit

Technology:

HVAC, Rooftop Unit