Traditional Culture Encyclopedia - Hotel franchise - Why does hot water flow out immediately when we turn on the hot water faucet in every hotel room?

Why does hot water flow out immediately when we turn on the hot water faucet in every hotel room?

Why does hot water flow when you open the hot water faucet? That is because the hot water in the hot water pipes circulates, so when you open the faucet, hot water flows out. For example, the hot water in the water pipes does not circulate. The boiler is on the 1st floor, and the hotel is on the 20th floor, so you must wait until the cold water in the pipes on the 1st to 20th floors is drained before hot water will come out.