In this proposed revision of Standard 128-2001, Method of Rating Unitary Spot Air Conditioners, the title has been changed to reflect the more common description of these products, 'portable air conditioners.' The scope has also been revised to apply only to units with a cooling capacity of 19,000 watts (65,000 Btu/h) and greater. Smaller units are now covered by AHAM Standard PAC-1 and by the Canadian Standards Association in its Standard C370. Finally, this new edition of Standard 128 adopts the rating methodology of C370 (which the AHAM standard also uses) so that all portable air conditioners can be rated in the same way.