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, condition, etc.) about your RTUs. Use the detailed fields to gather additional information (i.e., controls, usage patterns, features, etc.) for additional analysis of the RTUs identified for retrofit, replacement, or further analysis.
    This spreadsheet lists financial incentives and financing programs in areas for the highest energy savings opportunities.
    This fact sheet explains the variety of benefits from rooftop unit (RTU) replacements by validating energy and cost savings and other improvements through measurement and verification (M&V) methods.
    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.
    Efficiency Vermont successfully completed a 66-rooftop unit (RTU) high-efficiency replacement project on a large 140,000 square foot office building in Vermont. Real savings nearly doubled the estimated savings of $41,000 annually and was recognized by DOE's Advanced RTU Campaign.
    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 stores with the VFD solution and reported saving $5 million and 48 million kWh, a 22% reduction from before the VFD retrofit.
    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 market-ready energy efficiency measures, renewable energy generation, and energy systems integration.

Tool type:



HVAC, Rooftop Unit