The main box of the gas meter is too far away from the kitchen and bathroom, and the gas water heate

Natural gas hoses, just buy a longer one, set an iron water pipe, and it won't be beared.

The gas pipeline must be constructed by a professional assigned by the gas company, and you can apply for it by filing a report. Never install it yourself to avoid vicious accidents.

The kitchen has been converted into a hanging closet, and you don't cook anymore? Do you think it's appropriate to have a gas meter in the hanger room? The gas company probably won't install a gas meter in the hanger room, and some cities don't have gas in open kitchens. You'd better go to the gas company and ask.

Since the interface of the electric water heater is reserved, of course, the electric water heater can be installed, but there is no need to connect it in parallel, and the gas water heater inlet valve is closed when the electric water heater is used.

The ventilation area can reach one-tenth of the area between the surfaces, so there is no need for accident exhaust.