UL Subject 1020
Standard for Thermal Cutoffs for Use in Electrical Appliances and Components (Bulletin, 3/5/1999)
standard by Underwriters Laboratories, 03/05/1999
UL Subject 647
Standard for Unvented Kerosene-Fired Room Heaters and Portable Heaters (Bulletin, 2/25/1999)
standard by Underwriters Laboratories, 02/25/1999