This SAE Recommended Practice, limited to liquid coolant systems, establishes uniform vehicle heater test procedures. Both laboratory and complete vehicle tests are specified in this document. Required test equipment, facilities, and definitions are included. NOTE - Defrosting and defogging procedures and requirements can be found in SAE J902, J381, J382, and J953.
The technical report covers technology, products, or processes which are mature and not likely to change in the foreseeable future.