have two fireplaces at the house, not suitable for woodburning but fine for gas logs. we have a gas log upstairs everything is fine there. downstairs however i dont have anything setup at the moment and cold air is just pouring into the basement from it. there is nothing in there that i can close it off with like there is on the upstairs fireplace. for now i just have cut a cardboard box to fit the front and placed there taped it off, it isnt that great. what else could i do? alot of the mortar inside is broken away... ideally i could get some kind of metal insert (like a box) and put in there seal it off and make it usable for a gas log later. also how hard would it be to run gas lines to it, its just like 8 ft from where the line comes in and there are several places to "T" from.