Vented wall furnaces should be installed to avoid what kind of hazard?

Vented wall furnaces are designed to expel combustion gases produced during their operation safely outside the living space. This is crucial to avoid the accumulation of harmful gases, such as carbon monoxide, which can lead to severe health risks. By being properly vented, these furnaces mitigate the risk of overheating and ensure that flammable materials are not ignited by excess heat or sparks that may occur during operation. Additionally, an unvented furnace may create a dangerous buildup of gas inside the structure, presenting significant fire risks. Therefore, installing vented wall furnaces primarily addresses the fire hazard associated with improper combustion gas management, making it essential for safety in residential and commercial settings.