This SAE Recommend Practice establishes for passenger cars, light trucks, and multipurpose vehicles with GVW of 4500 kg (10 000 lb) or less, as defined by EPA, and M1 category vehicles as defined by the European Commission:
a. Minimum performance standards for defrosting and demisting systems. b. Test procedures that can be conducted on uniform test equipment by commercially available laboratory facilities.
This standard is being revised and updated to unify the content with the EU standards for defrost and demist as well as update sections to comprehend new vehicle technologies that have developed over the years since the last revision.