On 3/6/2020 5:04 PM, c1gmlm wrote:
I am putting our old home furnace in my pole barn. It is an 85,000 BTU set to use propane. Because it would be hard to transport bigger propane cylinders, would it be possible to hook up a couple of 20 lbs tanks? I would be heating the barn only on the days I am out there, not continuously.

Thanks for the input

Can? Yes, Should? Probably not
A 20 pound tank hods 430,000 BTU so you won't get a lot of run time.

In my last house we I had propane for cooking Two 100 pound tanks.
Never moved them, the propane company came and filled them. I don't
recall that we paid for them up front. That is a more sensible solution.

Talk to your propane company.