one is wood burning, but it could also be fueled via natural gas or a propane tank out of view. For gas you would need to run a gas line to it, but the time spent setting it up pays off in ease of use. Just turn it on, light it and you're good to go!
Tip 2: Make sure the area right around your bowl is
between the wood lattice and the house to enter the rest room. There is a bench under the red protruding wood for sitting and contemplating the zen garden in front.