A fuel-burning appliance located in a private garage must have its ignition sources installed by what minimum distance above the floor?

A fuel-burning appliance located in a private garage must have its ignition sources installed at a minimum height of 1.5 feet above the floor to ensure safety and compliance with codes. This height is crucial because garages can accumulate vapors from gasoline, oil, or other flammable materials that are heavier than air. If ignition sources, such as burners or pilot lights, are positioned too low, they can ignite these vapors, leading to potential fires or explosions. By ensuring that ignition sources are installed at least 1.5 feet above the floor, the risk of ignition from flammable vapors is significantly minimized. This requirement is part of safety regulations designed to protect both property and occupants in residential settings.