When installing a water heater in an attic, the passageway required should be a minimum of how many inches wide?

When installing a water heater in an attic, building codes typically require that the passageway to the unit be sufficiently wide to allow safe access for installation and maintenance. A minimum width of 24 inches is specified to ensure that an inspector or service technician can navigate the space comfortably without risking injury. This width accommodates the potential need to carry tools, parts, or the unit itself, facilitating easy access for repairs or inspections. Additionally, having a wider passageway reduces the risk of accidents in a confined space where movement can be restricted. This regulation reflects a focus on safety and access, which are critical components of good building practices.