These practices are cultural in nature and are not associated with Feng Shui.
1. Most individuals prefer to drink water after it has been boiled and cooled.
2. Historically, once the charcoal stove was used, the owner or their mother would continue to utilize it alongside a modern stove. The charcoal stove would only be discarded when it became significantly worn.
2.1. Logically, it seems wasteful to dispose of a nearly new charcoal stove, leading many to retain it for future use, especially if they move to a new home, thereby repeating the process.
3. It is important to note that these observations are not absolute. Often, individuals consult their elders, who have extensive experience, and if their practices differ, it raises the question of who is truly correct.