The door, then

It depends on the size of the heater when it is better to install it in the bath. If it is large and does not go into the door, then it is better to install it before the construction of the walls, but if small, then you can put it after. The wall around the stove should be made of non -flammable material. Paul near it should also be from slabs or stone. Fire safety is very important for wooden structures.