The kitchen is on the first floor, and the use of natural combustion liquefied gas, is it safe to ch

It can be transported, but it is not safe. In accordance with the rules for the safe use of gas. The distance between the liquefied gas stove and the cylinder should be between meters. >>>More

There's no distance rule here. However, from the perspective of safety, the closer the switch of the gas entrance pipe and the gas stove is, the safer it is, and the more pressure it is. Due to the use of the environment needs liquefied gas on the first floor and the kitchen on the third floor, as long as the pipeline is well sealed, the gas pressure from the liquefied gas tank to the kitchen can also meet the use (just consider that the farther the gas transmission distance, the greater the pressure loss), and according to the regulations, the gas (including liquefied gas) pipeline is strictly forbidden to pass through the bedroom where people live, this item should also be noted.

Consider installing a water storage tank on the roof of the building to store water for the water heater. In this way, there is no fear that when the local water is cut off, there will be no hot water for bathing. >>>More

No, you can do it without choking on the kitchen fumes.

In any way, the bathroom is not a good solution on top of the kitchen.