I think I just came up on a great deal on a natural gas fireplace insert I have never installed one of these before so any suggestions you have would be appreciated . first off what size gas line would I need it will be about a 75 foot run. 2nd what kind of flue liner would I need. 3rd any thing I'm missing except the electrical and on that subject would it be 15 or 20 amp? I know I can install it with my sons help just have a lot of questions if I even get this one . but I will get one by spring.