Why is the kitchen on fire but not on the toilet when the strong exhaust gas heater is on fire?

I just want to ask, did the merchant install it for you later? I also have an open balcony, and Rinnai also said that it can't be installed, but although the balcony on my side is open, where will the wind and sun shine.

The installation of a strong exhaust water heater in a windowless kitchen should also make a small hole in the wall to connect the exhaust pipe out, otherwise the family may be poisoned by hypoxia carbon monoxide when used in the future, and any regular installer will not install a water heater for you.

Natural gas water heaters cannot be installed in restrooms. Because the gas water heater needs to consume a lot of oxygen during use, and the bathroom is a closed space, if the lack of oxygen in the bathroom is caused, a large amount of carbon monoxide, carbon dioxide and other toxic gases will be produced, which is easy to cause hypoxia and fainting accidents during the bathing process.

Strong exhaust water heater: It is a semi-closed water heater, which absorbs air indoors, and the exhaust gas is forced to be discharged outdoors by the fan. Upstairs at your house, you don't have to worry about it, because the general water heater exhaust hole is outside. >>>More

It can be put in the wall cabinet, there is no problem, you can open a square opening on the top plate, and maintain a certain air intake.