UL 647-1993 UL Standard for Safety Unvented Kerosene-Fired Room Heaters and Portable Heaters Second Edition; Reprint with Revisions Through and Including July 27, 2001
Standard for Safety Unvented Kerosene-Fired Room Heaters and Portable Heaters.
UL 647-1993 history
1970UL 647-2010 UL Standard for Safety Unvented Kerosene-Fired Room Heaters and Portable Heaters
1993UL 647-1993 UL Standard for Safety Unvented Kerosene-Fired Room Heaters and Portable Heaters Second Edition; Reprint with Revisions Through and Including July 27, 2001