TSC 4.11 pertains to commercial building applications, which also use household equipment (only minimum equipment, such as an electric kettle, oven, refrigerator, etc.), and may have the option to choose from the top two ratings.
TSC 4.12 is specifically for the household/ residential sector, which needs to be aligned with NEA consumer durable energy rating, as the use of such equipment scale is large.
[Updated in Dec 2025]