PRESS RELEASE

    Version 6.2 of Building Efficiency System Tool™ (BEST) Now Available for Download

    Version 6.2 of Building Efficiency System Tool™ (BEST) Now Available for Download

    Ontario, Calif. — Version 6.2 of the Radiant Professionals Alliance’s (RPA) Building Efficiency System Tool™ (BEST), an interactive commercial building HVAC system efficiency comparison application, is now available for download HERE. The enhanced BEST 6.2 focuses attention on energy use, including up to four selected systems in one life-cycle comparison report that utilizes historical design temperatures to determine peak energy demand and the energy utilization index (EUI).

    The latest version of BEST addresses the challenge of sustainability and decarbonization tactics to use less energy. The application helps identify the choices clearly by utilizing data from projects throughout the United States. BEST 6.2 now includes up to 10 building types per 1,000 U.S.-based locations, based on weather, load and utility rates provided by trusted sources. 

    “Our industry is changing rapidly and utilizing digital modeling tools can help us to make informed decisions about building systems and the options we have,” said John A. Mullen, technical liaison to the Radiant Professionals Alliance and director of technical services and research with The IAPMO Group.

    BEST 6.2 includes a Demand Energy Efficiency Ratio (DEER) tab that makes it easier than ever to compare energy demand to existing efficiency ratings.

    “When you use BEST software for system design, you get a side-by-side comparison of up to four system types,” said Greg Cunniff, head of Application Engineering for the Hydronics Industry Alliance (HIA), the RPA committee responsible for the development of BEST. “This free tool can help determine the return on investment for building owners who looking to have the most efficient building on the block or benchmark their current use for long-range capital planning.”

    Upon its introduction in 2016, BEST solved a long-standing industry issue of being able to accurately compare different styles of HVAC systems, which are all tested to different standards, with various efficiency ratings (EER, IEER, SEER, COP, HSPF), as they are applied in an actual building.

    To learn more about the HIA and the RPA, or to join this important efficiency advocacy effort, visit www.hia-c.org and www.radiantpros.org. Please contact John Mullen at john.mullen@iapmo.org or (631) 994-4774 for any questions on the RPA and the BEST software.

    IAPMO Announces Publication of IAPMO/ANSI/CAN Z1403-2026, Water Demand Calculator

    14 October 2026

    IAPMO® is pleased to announce the publication of IAPMO/ANSI/CAN Z1403-2026, Water Demand Calculator®, a new American National Standard and National Standard of Canada that provides a modern, statistically based method for estimating peak water demand in single-family and multifamily residential buildings. 

    SCB Issues First AAC Certification Program Certificates

    08 October 2026

    IAPMO’s Systems Certification Body (SCB) has issued the first certificates under the Aluminum Anodizers Council (AAC) Certification Program, providing independent third-party verification of conformity with established performance requirements for anodized aluminum finishes and products.

    Shirley Dewi Promoted to Executive Vice President of IAPMO R&T

    05 October 2026

    IAPMO® is pleased to announce that Shirley Dewi has been promoted to executive vice president of IAPMO R&T, where she will provide strategic leadership and oversight for the organization’s certification and compliance operations, including Product Certification, the Systems Certification Body (SCB) and Continuous Compliance.

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