Hi all, I am remodelling the kitchen and need to remove a wall to give more space, unfortunately my 40 gallon gas hot water heater will need to be moved.

can I build a 32inch square enclosure in my porch and move it outside?

Also the roof of the porch is metal so rather than make a big hole in it can I take the exhaust flu out the side of the porch via a 90 degree bend and cap it outside rather than through the roof?

All help with code will be greatful

Regards

Alan