I've been given a traditional up draft furnace that I want to put in my pole barn but need to get some info first. The furnace is 75,000 btu and is about 8-10 yrs old,it has a plastic exhaust vent and electric ignition so I know it must be of the higher efficiency. 1st question, I need to run a gas line off of the natural gas meter on the side of my house, it is around 125 feet from my garage, what kind on line should I use and what would be easiest? The other questions involve the wiring and venting so if anyone is knowledgable in these areas I will post picks of my furnace and the parts in question. I am very handy and will attempt anything, I just need a little direction. Thanks Jason

As far as the gas plumbing above ground, you need to use black iron piping. It's cheap (Home Depot) and is the safest thing to use. for the burial use plastic gasline. As far as the wiring i'll let someone else speak on that. What brand is it?

I will post some pics and brand/model tomorrow, maybe there some heating/cooling guys on here.

wiring should be power source and themometer.

If it is a high efficiency with a pvc vent it will also have a condensate drain on it. Do you have a way to deal with this in your shed? Also you should not turn the furnace off or the condensate will freeze in the lines causing damage. All is fine if you are going to keep the space above freezing. If you want to turn the heat on and off I would get a furnace without the condensate drain,= lower efficiency.

first thing that comes to mind is.is your house hooked to low or medium pressure line ? you'll need to find that out from gas co. if low you may not have enough gas to run your house and garage. this will cause big problems. if medium pressure you should be fine. only way you can hook up to low pressure is have gas co. tap into line and run a line to garage with seperate regulator for garage.