Evaluating and Managing Advanced RTU Control Retrofits

This toolkit contains resources to help HVAC contractors and service companies work with their customers through a step-by-step method of evaluating and managing their inventory of RTUs and how to make the business case for advanced RTU control retrofits.

    This decision tree guides the 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 spreadsheet lists financial incentives and financing programs in areas for the highest energy savings opportunities.
    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.
    This specification lists potential important features and best applications for advanced rooftop unit controllers.
    This document outlines the Federal Energy Management Program's standard procedures and guidelines for measurement and verification (M&V) for federal energy managers, procurement officials, and energy service providers.
    The creative and determined leadership of Efficiency Vermont successfully completed a 66-rooftop unit (RTU) high-efficiency replacement project on a large 140,000 square foot office building in Vermont.
    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.
    As part of the U.S. Navy’s overall energy strategy, the National Renewable Energy Laboratory (NREL) partnered with the Naval Facilities Engineering Command (NAVFAC) to demonstrate marketready energy efficiency measures, renewable energy generation, and energy systems integration.

Tool type:



HVAC, Rooftop Unit