Proposed Standard BSR/RESNET/ACCA 310-201x, Standard for Grading the Installation of HVAC Systems, establishes a methodology for evaluating the installation quality of Unitary HVAC systems. It establishes the procedures, tolerances, and record keeping required to evaluate elements of an HVAC System’s design and installation. The methodology is comprised of five tasks – a design review, a total duct leakage test, a Blower Fan volumetric airflow test, a Blower Fan watt draw test, and a non-invasive evaluation of refrigerant charge. The five tasks are designed to be completed in sequence and upon completion of each task, the results are evaluated for compliance with specified thresholds. This standard is applicable to Unitary HVAC Systems including air conditioners and heat pumps up to 65 kBtuh and furnaces up to 125 kBtuh in detached one- and two-family Dwellings, Townhouses, as well as in Dwelling Units and Sleeping Units that have their own HVAC system separate from other units. It is intended for use by home energy raters, energy auditors, code officials, or HVAC contractors. This first draft, PDS-01, of BSR/RESNET/ACCA 310-201x is submitted for public comment for 60 days. All of draft PDS-01 is open for comment. To review and comment on the Draft follow the links below. Draft PDS-01, BSR/RESNET/ACCA 310-201x and Appendix A, HVAC Design Temperature Limits Comment on Draft PDS-01, BSR/RESNET/ACCA 310-201x and Appendix A View comments on Draft PDS-01, BSR/RESNET/ACCA 310-201x and Appendix A The public comment period will be open for 60 days beginning June 7, 2019 through August 6, 2019. Comments will be accepted on all text in draft PDS-01. Tips and Reminders for Submitting Public Comments Comments must include a specific proposed change to the text of the draft open for comment. Proposed added text must be underlined and text proposed to be removed must be shown using strike-through. If not submitted in this format, the public comment may be rejected If you submit public comment representing the collective interests of a group of stakeholders, you are encouraged to submit ONE public comment and identify all stakeholders in that comment. While not required, this expedites the ability of the committees to respond to commenters in a timely manner. Public comments are reviewed by committees with volunteer members, that are Raters, Providers, Software Developers and other industry and public interest stakeholders. They are not reviewed by RESNET Staff. Most amendments to RESNET standards are proposed by industry and public stakeholders not RESNET. To learn more about submitting proposed amendments CLICK HERE.