[Speedslug]

My earlier comments were about using piped in fuel from the city in the continental US.

But you may well be better off using butane tanks.

I am not sure about butane but I know that propane is heaver than air and any leaks will sink to the lowest area and can then ignite in a big boom so the tanks need to be outside all the time.

I think propane and butane fuels have something like 4 or 5 times as much heating capacity as the piped in natural we use here in the continental US for furnaces and stoves and sometimes clothes dryers.

If you do use tanked fuel you can read the studio conversations here about how to pipe the tanked fuel through a wall firmly anchoring the piping on both sides of the wall with a shut off valve that comes with the tank, a valve just before it goes into the wall, a valve just inside the wall and then the valve on the torch.

Having all the valves will give you lots of shut off control points that are well away from any possible burning fuel should something bad happen so you can safely shut it off in an emergency.