Back when I was actually young I used to go to the mall with our friends.
The two of us used to love hanging out plus shopping. The mall in our local section at the time was unlike any general mall in the country as far as I knew. They had these actually pricey plus charming water fountains that went so high up in the air. Then they had a actually superb central heating plus a/c set up too. The air vents were both in the floors plus in the walls. At that time seeing air vents in the floors was pretty unusual, what was even more odd was the fact that if you looked inside those air vents of the central heating plus a/c method you would see pennies down there! People used to throw pennies in the fountain to make a wish, then but they were also throwing pennies down the air vents that were in the floors! This was pretty messed up when I suppose about it now as a full grown adult. The pennies down in those air vents could have eventually caused some extreme damage to their central heating plus a/c method unit! I would imagine that it was most likely a commercial heating plus a/c machine because of how pressing this mall was. A general heating plus a/c method would have never covered this entire building; Unless they had several central heating plus a/c units. And I do not suppose they did.