These recommendations outline the insurers’ classification of heaters employing solid materials, electricity, oil, gas and geothermal sources of fuel. A dedicated section addresses central heating systems. The document applies to portable, transportable and fixed space heating appliances.
For the convenience of property insurers, space heaters are classified into six classes: A,B,C,D,E and F, corresponding to their relative fire hazard, where A represents the least overall hazard and F the greatest overall hazard. Heaters in Class F will give rise to special consideration and certain types of heater may be undesirable in particular circumstances.