Excerpts
April 2024 TP Final Rule adopted the following changes:
(1) Specify testing instructions for furnace fans incapable of operating at the required external static pressure (âESPâ);
(2) Incorporate by reference the most recent versions of industry standards, ASHRAE 103-2017 and ASHRAE 37-2009 (RA 2019), in 10 CFR 430.3;
(3) Incorporate by reference chapter 1 of the 2021 ASHRAE Handbook;
(4) Define âdual-fuel furnace fansâ and exclude them from the scope of appendix AA;
(5) Change the term âdefault airflow control settingsâ to âspecified airflow