What is the standard testing procedure for the AC to AC efficiency and degradation verification ?
The standard testing procedure for AC-to-AC efficiency and degradation verification —especially for air conditioners and heat pumps—follows a combination of DOE regulations , AHRI standards , and ISO protocols . Here's a consolidated overview of the key procedures and standards: 🔧 1. DOE Test Procedures (U.S. Department of Energy) The DOE mandates testing under Appendix M1 and Appendix M2 of 10 CFR Part 430 for central air conditioners and heat pumps: Appendix M1 uses updated metrics: SEER2 (Seasonal Energy Efficiency Ratio 2) EER2 (Energy Efficiency Ratio 2) HSPF2 (Heating Seasonal Performance Factor 2) Appendix M2 introduces: SCORE (Seasonal Cooling and Off-mode Rating Efficiency) SHORE (Seasonal Heating and Off-mode Rating Efficiency) These procedures include: Controls verification for variable speed systems Low-temperature heating performance Defrost cycle impact Power consumption of auxiliary components Represented values and enforcement provisions...