means a freezer that has total volume less than 7.75 ft3:
(1) rated volume, as determined using 10 C.F.R. part 430, Appendix B1 of Subpart B and that is manufactured before September 15, 2014;
(2) as determined using 10 C.F.R., part 430, Appendix A to Subpart B and that is manufactured on or after September 15, 2014.