Wall furnaces must be located to prevent hazards to ________________.

Wall furnaces must be positioned carefully to minimize hazards to walls, floors, furniture, and doors due to the heat they produce during operation. This is crucial because improper installation or placement could lead to excessive heat being directed toward flammable materials, resulting in potential fire hazards.

By ensuring that the furnace is strategically located, it allows for safe heat distribution and helps maintain the integrity of surrounding structures and furnishings. This consideration is in line with safety practices mandated by the NFPA Liquefied Petroleum Gas Code, aimed at preventing property damage and ensuring the safety of individuals in proximity to heating appliances.

Other options do not encompass the full range of considerations necessary for safe furnace installation. Addressing only furniture does not take into account other critical components like walls and floors that can also be affected by heat, while appliance ventilation, while important, deals specifically with airflow and does not encompass the broader potential hazards. Lastly, electric systems may also be a concern, but they are not directly relevant to the placement of wall furnaces regarding immediate fire risk from heat exposure.