For the same reason that people using passive heating (in the opposite way to me e.g. in England) don't just insulate the pipes etc that their water come from, the water coming in is already hot, and insulation would still let the water heat up anyways since it is left in the open for the whole...
Thanks very much for the reply! You're right that it is similar to a Chiller system, however, from what I've researched, chiller systems use an actual chiller and compression tank etc. and use this cooled water to cool the air etc. However, with mine I don't intend to use the chiller etc. Just a...
I live in Dubai, and the water for my whole house is stored in a water tank on my roof. This is a problem as during the summer months the temperatures reach up to and a bit beyond 50 degrees in the day, this heats up the water in the tank a lot so we don't have any cold water during the later...