UL 647 PDF

Unvented Kerosene-Fired Room Heaters and Portable Heaters

UL 647 – Unvented Kerosene-Fired Room Heaters and Portable Heaters

Please note:All interim revisions for this edition available at time of your purchase will be included.

These requirements apply to unvented kerosene-fired room heaters and portable heaters as defined herein. They are for use with Type 1-K Kerosene, and SyntheticFuels complying with the Outline of Investigation for Synthetic Fuels for Kerosene-Fired Portable Heaters and Room Heaters, Subject 647A, in spaces that are wellventilated to provide the supply of air required for combustion and to reduce the risk of accumulation of carbon monoxide. These heaters are for attended orunattended use. These products are required to be equipped with automatic primary safety controls or to be inherently constructed to prevent abnormal discharge offuel at the burner in case of ignition failure or premature flame extinguishment. They are not intended for use under the following conditions:

1. In spaces in which flammable vapors or gases may be present, or
2. As cooking appliances.