Wall-mounted appliances such as split AC indoor units, kitchen chimneys, and certain water heater models rely on secure structural support, and confirming the mounting surface can bear the appliance's weight over years of vibration and use is an important step often rushed during installation. Hollow or lightweight partition walls, common in some modern constructions, may not provide adequate holding strength for standard wall anchors, requiring either mounting into a structural stud or beam where present, or using specialized heavy-duty anchors rated for the specific wall material and appliance weight.