So... I have been coming home from work the last few days around 2:30AM. I come home from work and usually smell like fuel, exhaust, and sweat. Thus I deside to take a shower. Here is where the puzzle presents it self. I am the absolute farthest appartment from the boiler, which is in the basement on the opposite end of the building. When I turn on the shower, the water initially comes out luke warm. After a few minutes it warms up to almost normal hotness, so I hop in... About 30 seconds after I get in the water goes to cold! usually just as I get my hair full of soap. Once it goes cold, it takes several minutes until it gets back to hot, but then it will be steady hot for as long as I want. This phenominon only presents itself when I take showers at odd times of the day, like 2:30 in the morning or 3 int he after noon...(low building water usage times.
Intuitively it seems like the water should get progressively warmer as the shower runs... given that the most resent water to have left the boiler should be farthest away and take the most time to get to my shower resulting in a slow warming of the water as it becomes "fresher" from the boiler. It becomes obvious to me that this is not the process that actually happens.
I have some theories as to what is actually happening, but I am intested in what you cats come up with.