I would like to install a propane fireplace insert. I would like to run a black Iron pipe from the exterior of the house across the basement celing to the base of the fire place. Up the clean out cavity into the fire box. What is the best type of flexible tubing to run up and into the fire box? Does this sound like the way to go? Do I need a shut off in the basement? If so do I need to be able to shut the propane supply off from the floor the gas stove in on? Can the electrical power to run the fan be brought in the same way?